I have come up with this for a light gaming PC, I have a budget of £800
HD-023-WD Western Digital Caviar Special Edition 80GB 800JD SATA-II 8MB Cache - OEM (HD-023-WD)
£27.50 £27.50
SP-024-LG Logitech S100 10W RMS Speakers Beige - OEM (SP-024-LG)
£5.49 £5.49
CD-045-LG LG GSA-H10NBAL 16x16 DVD±RW Dual Layer ReWriter (Black) - OEM (CD-043-LG)
£20.50 £20.50
MO-015-BQ BenQ FP71G+ 17" LCD Monitor (MO-015-BQ)
£104.99 £104.99
KB-013-LG Logitech Deluxe Keyboard (White) - OEM (KB-013-LG)
£5.99 £5.99
CP-126-IN Intel Core 2 DUO E6300 "LGA775 Allendale" 1.86GHz (1066FSB) - Retail (CP-126-IN)
£116.99 £116.99
MY-012-GS G.Skill 2GB DDR2 LA PC2-5400 (2x1GB) CAS4 Dual Channel Kit (F2-5400PHU2-2GBLA) (MY-012-GS)
£109.99 £109.99
GX-044-CO Connect3D ATI Radeon X1800 XT 256MB GDDR3 AVIVO TV-Out/Dual DVI (PCI-Express) - Retail (GX-044-CO)
£125.99 £125.99
CA-048-AN Antec SLK3800BUK Black Quiet Midi Tower Case - 400W SmartPower PSU (CA-048-AN)
£54.95 £54.95
MB-061-GI Gigabyte GA_965P_DS3 (Socket 775) PCI-Express DDR2 Motherboard (MB-061-GI)
£91.99 £91.99
Subtotal £664.38
VAT £116.27
Total £780.65
HD-023-WD Western Digital Caviar Special Edition 80GB 800JD SATA-II 8MB Cache - OEM (HD-023-WD)
£27.50 £27.50
SP-024-LG Logitech S100 10W RMS Speakers Beige - OEM (SP-024-LG)
£5.49 £5.49
CD-045-LG LG GSA-H10NBAL 16x16 DVD±RW Dual Layer ReWriter (Black) - OEM (CD-043-LG)
£20.50 £20.50
MO-015-BQ BenQ FP71G+ 17" LCD Monitor (MO-015-BQ)
£104.99 £104.99
KB-013-LG Logitech Deluxe Keyboard (White) - OEM (KB-013-LG)
£5.99 £5.99
CP-126-IN Intel Core 2 DUO E6300 "LGA775 Allendale" 1.86GHz (1066FSB) - Retail (CP-126-IN)
£116.99 £116.99
MY-012-GS G.Skill 2GB DDR2 LA PC2-5400 (2x1GB) CAS4 Dual Channel Kit (F2-5400PHU2-2GBLA) (MY-012-GS)
£109.99 £109.99
GX-044-CO Connect3D ATI Radeon X1800 XT 256MB GDDR3 AVIVO TV-Out/Dual DVI (PCI-Express) - Retail (GX-044-CO)
£125.99 £125.99
CA-048-AN Antec SLK3800BUK Black Quiet Midi Tower Case - 400W SmartPower PSU (CA-048-AN)
£54.95 £54.95
MB-061-GI Gigabyte GA_965P_DS3 (Socket 775) PCI-Express DDR2 Motherboard (MB-061-GI)
£91.99 £91.99
Subtotal £664.38
VAT £116.27
Total £780.65