Still open to tweaks but this is what I would reccommend, avoid Maxtor HDD's like the plague, they are devastatingly unreliable, also the MSI mobo I included is a bit better and will clock well if you are considering it.
CP-134-AM AMD Athlon 64 X2 Dual Core 3800+ (Socket 939) - Retail (ADA3800BVBOX) (CP-134-AM)
£179.95 £179.95
MB-046-MS MSI K8N Neo4 Platinum nForce4 Ultra (Socket 939) PCI-Express Motherboard (MB-046-MS)
£64.95 £64.95
MY-046-GL GeIL 2GB (2x1GB) PC3200 Value Dual Channel Kit CAS3 (GE2GB3200BDC) (MY-046-GL)
£89.95 £89.95
GX-048-PC PowerColor ATI Radeon X1800 XT 512MB GDDR3 AVIVO TV-Out/Dual DVI (PCI-Express) - Retail (GX-048-PC)
£209.95 £209.95
HD-001-HI Hitachi Deskstar T7K250 NCQ 160GB SATA-II 8MB Cache - OEM (0A31637) (HD-001-HI)
£44.95 £44.95
CD-026-NE NEC ND4551 16x16 DVD±RW Dual Layer LabelFlash ReWriter (Black) - OEM (CD-026-NE)
£25.95 £25.95
CA-040-AN Antec Sonata II Piano Black Quiet Case - 450W Smart Power PSU (CA-040-AN)
£59.95 £59.95
Subtotal £675.65
VAT £118.24
Total £793.89