sakibsadmanshajib

What's good for games is generally not good for servers/workstations, and vice versa. Eg, lots of cores in a workstation is good since the applications will generally use all of the cores, while in games only 3 or 4 cores would get used, so you'd want fast cores.  Also when you're overclocking those servers will go down, and instability could mean you lose data when the PC crashes. 
 
Since budget is unlimited, get 2 systems. 1 server/render box/workstation and 1 gaming/overclocking machine.
 
@skyress3000 has suggested a really good gaming build, (apart from the WD red drive, which is meant for use in NASes/servers ) so I'll tackle the workstation/server part of the specification:
PCPartPicker part list / Price breakdown by merchant   CPU: Intel Xeon E5-2697 V3 2.6GHz 14-Core Processor  ($2549.99 @ SuperBiiz)  CPU Cooler: Corsair H90 94.0 CFM Liquid CPU Cooler  ($78.99 @ Newegg)  Motherboard: ASRock X99 WS-E EATX LGA2011-3 Motherboard  ($414.99 @ Newegg)  Memory: Samsung 16GB (1 x 16GB) Registered DDR4-2133 Memory  ($107.99 @ SuperBiiz)  Memory: Samsung 16GB (1 x 16GB) Registered DDR4-2133 Memory  ($107.99 @ SuperBiiz)  Memory: Samsung 16GB (1 x 16GB) Registered DDR4-2133 Memory  ($107.99 @ SuperBiiz)  Memory: Samsung 16GB (1 x 16GB) Registered DDR4-2133 Memory  ($107.99 @ SuperBiiz)  Storage: Western Digital Red 1TB 3.5" 5400RPM Internal Hard Drive  ($62.75 @ OutletPC)  Storage: Western Digital Red 1TB 3.5" 5400RPM Internal Hard Drive  ($62.75 @ OutletPC)  Storage: Western Digital Red 1TB 3.5" 5400RPM Internal Hard Drive  ($62.75 @ OutletPC)  Storage: Western Digital Red 1TB 3.5" 5400RPM Internal Hard Drive  ($62.75 @ OutletPC)  Storage: Western Digital Red 1TB 3.5" 5400RPM Internal Hard Drive  ($62.75 @ OutletPC)  Video Card: Asus GeForce GTX Titan X 12GB Video Card (2-Way SLI)  ($994.99 @ SuperBiiz)  Video Card: Asus GeForce GTX Titan X 12GB Video Card (2-Way SLI)  ($994.99 @ SuperBiiz)  Power Supply: SeaSonic X Series 850W 80+ Gold Certified Fully-Modular ATX Power Supply  ($129.99 @ SuperBiiz)  Total: $5909.65 Prices include shipping, taxes, and discounts when available Generated by PCPartPicker 2015-11-15 10:39 EST-0500 that and add a raid card for the hard drives to ensure you won't lose any data if a drive dies   So there you have it, if you do want to blow $10k on computer parts, there's an option for you

Yeah, it'll still be X99. Go watch the latest WAN show.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i7-6700K 4.0GHz Quad-Core Processor ($389.99 @ Newegg)
CPU Cooler: NZXT Kraken X61 106.1 CFM Liquid CPU Cooler ($119.99 @ B&H)
Motherboard: Asus MAXIMUS VIII HERO ATX LGA1151 Motherboard ($219.99 @ SuperBiiz)
Memory: Corsair Dominator Platinum 32GB (4 x 8GB) DDR4-2666 Memory ($289.99 @ Newegg)
Storage: Samsung 950 PRO 512GB M.2-2280 Solid State Drive ($346.25 @ Amazon)
Storage: Western Digital Red 2TB 3.5" 5400RPM Internal Hard Drive ($89.88 @ OutletPC)
Video Card: MSI GeForce GTX 980 Ti 6GB Video Card ($739.99 @ B&H)
Case: NZXT Noctis 450 ATX Mid Tower Case ($117.99 @ Directron)
Power Supply: EVGA SuperNOVA P2 850W 80+ Platinum Certified Fully-Modular ATX Power Supply ($109.99 @ Newegg)
Monitor: Acer Predator X34 100Hz 34.0" Monitor ($1299.98 @ NCIX US) - not 4k, but curved ultrawide with G-Sync
Keyboard: Corsair K70 RGB Wired Gaming Keyboard ($166.94 @ Amazon)
Mouse: Mionix Castor Wired Optical Mouse ($69.99 @ Amazon)
Total: $3960.97
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-11-15 10:13 EST-0500
 
*note: some of this stuff is more expensive than it needs to be (mobo, RAM) and was just based off your suggestions, so it could be changed.

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231972&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-PCPartPicker,%20LLC-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=
 
Kits do exist. Ignore those that tell you that you do not need 64GB of memory. Clearly they have never used primocache a day in their life, or else they would be speaking a different tune entirely.