Will he be using it for multitasking?
As your using it for work and low graphics games it may be better to go for a Intel dual core.
CP-116-IN Intel Pentium 4 805 Dual Core "LGA775 Smithfield" 2.6GHz (533FSB) - Retail (CP-116-IN) 1
£79.95 £79.95
MB-141-AS Asus P5LD2-SE Intel 945P (Socket LGA775) PCI-Express Motherboard (MB-141-AS) 1
£61.95 £61.95
HD-024-SA Samsung SpinPoint P HD160JJ 160GB SATA-II 8MB Cache - OEM (HD-024-SA) 1
£45.95 £45.95
CA-048-AN Antec SLK3800BUK Black Quiet Midi Tower Case - 400W SmartPower PSU (CA-048-AN) 1
£51.95 £51.95
CD-026-NE NEC ND4551 16x16 DVD±RW Dual Layer LabelFlash ReWriter (Black) - OEM (CD-026-NE) 1
£25.95 £25.95
MY-046-GL GeIL 2GB (2x1GB) PC3200 Value Dual Channel Kit CAS3 (GE2GB3200BDC) (MY-046-GL) 1
£94.95 £94.95
GX-054-PC PowerColor ATI Radeon X800 GTO 256MB GDDR3 TV-Out/DVI (PCI-Express) - Retail (GX-054-PC) 1
£49.95 £49.95
Subtotal £410.65
VAT £71.87
Total £482.52