Video card Upgrade Question

[Ashoroth]

Here is my Question to you guys, below in my signature is my current system specs. This system works fine for me for most of my gaming needs with one exception DX12.

Now here is some information that I think should be stated upfront:

• I will not be moving past 1080p Gaming anytime soon (seriously cant afford to replace my monitors atm.)
• I want to move from a R9 270x to a better DX12 card
• To satisfy the lazy reader that doesn't want to look at my signature I will be putting this new Card in a Asus Sabertooth z87, i7-4770k, and 16Gb Kingston HyperX Fury DDR3 1866 Dual channel Memory.
• I will not entertain upgrading mobo,cpu,ram till after Intel and AMD settle down a little with the ryzen and i9 platform (more mainstream and early adopter tax is passed)
• Lastly I know AMD and nVidia are looking to push some really nice cutting edge gpu's in the near future so I'm not looking to break the bank.

Now with that said for the time being I want to keep my current platform and JUST upgrade the Video card, so with that in mind I am looking for suggestion hopefully with some tech specs to back up claims. 

What I would like to see is a card that has enough performance @ 1080p that my Motherboard and CPU and Memory start to become the bottleneck again, but also looking for the best FPS per dollar(USD) at that point. The card I am replacing is a Sapphire R9 270x 4GB Pci-e card. 

[Varpin]

Maybe go with a RX 580? You're gaming in 1080p so it would be pretty good choice. 

[Ashoroth]

Thanks for the Quick reply, Given the Price range of the RX 580 ($350-$550USD) Wouldn't the nVidia GTX 980 Ti 6GB Card ($479-$600USD) be better Given the Price is roughly the same? Looking at a Price per FPS point of view.