The Cohhilition

Hey guys, just after some help upgrading my existing machine. It works but it is soul destroying only being able to run AAA games on medium settings...

So, my budget is: no more than £500
I live in London, UK.
Operating system: Got Win 7 64-bit
Monitors: Got two already. 27" and 24"
Gaming resolution : 2560x1440 (primary) and 1920x1080 (secondary)
Peripherals?: Not needed, using G19 keyboard and G700 mouse.
Will you do overclocking?: Nope.
What are you planning to do with the pc?: High spec Gaming.

I currently have inside my tower:
Motherboard: ASUS Z87-A
Processor: i5 4430 @ 3000 MHz
RAM: 8192MB DDR3-SDRAM
Graphics card: AMD Radeon HD 7950
Hard Disk: 2x ATA SAMSUNG HD103SJ SCSI Disk Device (1000GB)
1x ATA Samsung SSD 840 SCSI Disk Device (250GB)

well a gtx 970 would be nice, or 2 if you want it to roll really smooth or 2x 290x. You could also go for a higher en cpu although it wouldnt really help you much in terms of raw fps. Then there is comfort items like a nice cooler or a nice power supply.

ok cool, I'll look into those cards, thanks mate