£2000 is serious overkill.
Here's a FULL AMD system including monitor keyboard and mouse for just over a grand, even has an SSD for the OS and the thermal paste!

lol
Powercolor ATI Radeon HD 4890 PCS+ BattleForge Edition 1024MB GDDR5 PCI-Express Graphics Card £167.99
(£146.08) £167.99
(£146.08)
AMD Phenom II X4 Quad Core 955 Black Edition 3.2GHz (Socket AM3) - Retail AMD Phenom II X4 Quad Core 955 Black Edition 3.2GHz (Socket AM3) - Retail £149.99
(£130.43) £149.99
(£130.43)
Asus Crosshair III Formula AMD 790FX (Socket AM3) PCI-Express DDR3 Motherboard Asus Crosshair III Formula AMD 790FX (Socket AM3) PCI-Express DDR3 Motherboard £142.99
(£124.34) £142.99
(£124.34)
Acer V223WBbd 22" Widescreen LCD Monitor Acer V223WBbd 22" Widescreen LCD Monitor £111.99
(£97.38) £111.99
(£97.38)
OCZ Vertex Series 30GB 2.5" SATA-II Solid State Hard Drive (OCZSSD2-1VTX30G) OCZ Vertex Series 30GB 2.5" SATA-II Solid State Hard Drive (OCZSSD2-1VTX30G) £109.99
(£95.64) £109.99
(£95.64)
PC Power & Cooling Silencer 750 Quad-SLi PCI-E 750W Power Supply PC Power & Cooling Silencer 750 Quad-SLi PCI-E 750W Power Supply £89.99
(£78.25) £89.99
(£78.25)
Antec 902 Nine Hundred Two Ultimate Gaming Case - Black (No PSU) Antec 902 Nine Hundred Two Ultimate Gaming Case - Black (No PSU) £82.98
(£72.16) £82.98
(£72.16)
Razer Lycosa Gaming Keyboard Razer Lycosa Gaming Keyboard £61.00
(£53.04) £61.00
(£53.04)
OCZ Platinum Enhanced Bandwidth Edition 4GB (2x2GB) DDR3 PC3-12800C7 1600MHz Dual Channel (OCZ3P1600EB4GK) OCZ Platinum Enhanced Bandwidth Edition 4GB (2x2GB) DDR3 PC3-12800C7 1600MHz Dual Channel (OCZ3P1600EB4GK) £57.99
(£50.43) £57.99
(£50.43)
Western Digital Caviar Black 640GB SATA-II 32MB Cache - OEM (WD6401AALS) Western Digital Caviar Black 640GB SATA-II 32MB Cache - OEM (WD6401AALS) £53.99
(£46.95) £53.99
(£46.95)
Razer Copperhead Tempest Blue 2000dpi High Precision Gaming Mouse - Retail Razer Copperhead Tempest Blue 2000dpi High Precision Gaming Mouse - Retail £37.98
(£33.03) £37.98
(£33.03)
Akasa AK-967 Nero Direct Contact Heatpipe CPU Cooler (AM2/AM2+/939/LGA775/LGA1366) Akasa AK-967 Nero Direct Contact Heatpipe CPU Cooler (AM2/AM2+/939/LGA775/LGA1366) £26.99
(£23.47) £26.99
(£23.47)
Pioneer DVR-217FBK 22x DVD±RW SATA Dual Layer LabelFlash ReWriter (Black) - OEM Pioneer DVR-217FBK 22x DVD±RW SATA Dual Layer LabelFlash ReWriter (Black) - OEM £17.99
(£15.64) £17.99
(£15.64)
Arctic Cooling MX-2 Thermal Compound Arctic Cooling MX-2 Thermal Compound £4.59
(£3.99) £4.59
(£3.99)
Sub Total : £970.83
Shipping cost assumes delivery to UK Mainland with:
DPD Next Day Parcel
(This can be changed during checkout) Shipping : £15.50
VAT is being charged at 15% VAT : £147.95
Total : £1,134.28