xraycat87, go with AMD if you're on a budget. For example:
- AMD Bulldozer FX-4 Quad Core 4170 Black Edition 4.20Ghz (Socket AM3+) Processor
- Asus M5A97 PRO AMD 970 (Socket AM3+) DDR3 Motherboard
- TeamGroup Elite 8GB (2x4GB) DDR3 PC3-12800C11 1600MHz Dual Channel Kit
- Samsung 128GB SSD 830
- Sapphire HD 6950 OC "Dual Fan Edition" 2048MB GDDR5 PCI-Express Graphics Card
- Samsung SH-S222BB/BEBE 22x DVD±RW SATA ReWriter (Black) - OEM
= just under £500. Then you can get a case, PSU, kyb and mouse within £150.
I have a very similar system (only 6970 instead of 6950) and it runs flawless; BF3 in 1920x1080 ultra details with no problems.