Weak1ings

I'd vote for the Xeon even if you are gaming as someday, we may use more than 4 threads.
i5 only if your desire to overclock.

the 290x tri-x is $270 after MIR btw. but no gta

I'd like to have a friend like yours
Go for it, the Ivy-Bridge will Not limit you at all. 
If it does, Overclock too!

Add
Slow Shipping
having to wait a week for 16GB of RAM and my i7+mobo  

you mean 1/7th as fast
I'd probably recommend the 290X (not personally cause I'm a Nvidia fanboy)
The 970 is better at 1080p but not above.

All of your links are bad.  Just make a PCpartpicker
I think you should put more storage.  6TB minimum in this budget!  (HDD+SSD)

Sell it or build a htpc/guest computer.

I'd like the Windforce because it keeps the entire GPU cool vs hot spots like on the ASUS and EVGA.

There is far more than cores in choosing a processor.  Like Single-threaded perfromance.  AMD does not have it and is exceptionally slower in ALL programs especially compared to the i7.  The only thing they have is cheapness and better power than a dual-core Intel. 
 
The build is good except that I would rather you go lower on things like the dual HDD Raid? the H100 and so fourth to try to get a Titan X inside.  Things like a 500GB SSD.  Go for say a 120 GB at 25% the cost and a single 2TB.  Just stick to cutting down a bit on stuff and you'll get 980 sli or a Titan X inside that build which will be a far better choice than any 500GB SSD or etc... 

First off, that is a VGA cable. an older but still good display cable.
You will need a DVI to VGA adapter.  There are a few kinds but I personally like the ones that attach to the back of the card.  Your Graphics card may have one included so check there first.  If it doesn't, here is one for $2

First off, that is a VGA cable. an older but still good display cable.
You will need a DVI to VGA adapter.  There are a few kinds but I personally like the ones that attach to the back of the card.  Your Graphics card may have one included so check there first.  If it doesn't, here is one for $2

Something to note, that $225.00 happened to be a mistake and they have fixed it.  Nevertheless, I bought one

I'd strongly recommend a better CPU as building the world takes a long, long time even on fast hardware.

You should get a mere 256GB SSD and a godly 2-way Titan X SLI...
Then it'd work together.

I have 8GB myself, it's just CPU issues (or something else) I can get a good 50FPS without ENB and my CPU is hardly maxed.  The issue is that something unknown appears to be a limit.  In games like Spliter Cell: Blacklist, I can get 40-50 FPS on Very High and 60 with a little reduction.

170 FOV when I use all 3 monitors (rarely)

The Xeon will serve you best unless you can overclock that i5 to 7 Ghz.  (which'd be awesome!)

First off:  I don't know about Belgium prices so I let PC part picker adjust the part prices.  this is the $600 build but should do well.
PCPartPicker part list / Price breakdown by merchant

CPU: *Intel Core i5-4460 3.2GHz Quad-Core Processor  (€189.34 @ Home of Hardware DE)
Motherboard: Asus B85M-E/CSM Micro ATX LGA1150 Motherboard
Memory: *Corsair XMS3 8GB (1 x 8GB) DDR3-1333 Memory  (€60.98 @ Amazon Deutschland)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive  (€59.86 @ Amazon Deutschland)
Video Card: Gigabyte GeForce GTX 960 2GB Video Card  (€217.99 @ Amazon Deutschland)
Case: Fractal Design Core 1100 MicroATX Mini Tower Case  (€41.89 @ Amazon Deutschland)
Power Supply: *Antec EarthWatts Green 380W 80+ Bronze Certified ATX Power Supply  (€43.98 @ Amazon Deutschland)
Total: €614.04
Prices include shipping, taxes, and discounts when available
*Lowest price parts chosen from parametric criteria
Generated by PCPartPicker 2015-04-26 00:35 CEST+0200
 
If you were to go higher I'd aim for a better CPU like the 4690K or Xeon E3 1231 V3.
 
Or a better 960 more importantly as the current is a mini-ITX.

You still haven't really answered my question: 
Based on the available information I recommend sticking with what you have, or buy more of them and do surround and another 970   5-way 1080p monitors in portrait mode is amazing!

You need to have More Drive Capacity atleast 4TB to reflect the cost of that build.  1TB HDDs are for $500 PCs.  This one costs 7 times that.

I believe that 50% is more proper and commonly accepted.  doing %50 will likely just confuse people.

I believe that 50% is more proper and commonly accepted.  doing %50 will likely just confuse people.

Hey, thanks for the compliment!
 
I like your edit more especially the power supply but I think 1TB HDDs are the minimum for any user, that and for $12 more you can get more 500 Gigs.

I'm working on one, Does the price need the display in it?  OS?
 
Edit:
 
Here it is:
PCPartPicker part list / Price breakdown by merchant

CPU: *Intel Core i5-4430 3.0GHz Quad-Core Processor  ($176.80 @ Amazon)
Motherboard: Asus B85M-E/CSM Micro ATX LGA1150 Motherboard  ($73.58 @ Amazon)
Memory: *G.Skill Ripjaws X Series 8GB (1 x 8GB) DDR3-1600 Memory  ($49.99 @ Newegg)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive  ($46.99 @ NCIX US)
Video Card: MSI GeForce GTX 960 2GB Video Card  ($181.79 @ Amazon)
Case: Fractal Design Core 1100 MicroATX Mini Tower Case  ($38.99 @ NCIX US)
Power Supply: *Rosewill Stallion 500W ATX Power Supply  ($40.00 @ Newegg)
Total: $608.14
Prices include shipping, taxes, and discounts when available
*Lowest price parts chosen from parametric criteria
Generated by PCPartPicker 2015-04-18 22:56 EDT-0400
 
It has a GTX 960 and a i5 4430 at $608.  It'd be difficult to willingly go lower on anything.  You could skimp more on the motherboard but I would say go higher on the PSU, what is selected should be good though.

Looks good.
 
I have a few suggestions though:
Upgrade HDD to a 3TB for about $16
A Xeon E3 1231 V3 will provide double  the threads but cannot overclock +$30
More PSU wattage, Seasonic, Corsair, Rosewill, EVGA, and Antec are all great brands to choose.  More wattage so you can SLI later down the road.  (aim for 700W+ for a comfortable 970 SLI)