Burly said:
what would you get if the budget was £650?
For those same four components? Probably a better motherboard for OC'ing, faster memory, and a faster conroe. For example:
REFERENCE DESCRIPTION QUANTITY PRICE COST REMOVE
GX-044-CO Connect3D ATI Radeon X1800 XT 256MB GDDR3 AVIVO TV-Out/Dual DVI (PCI-Express) - Retail (GX-044-CO)
£136.95 £136.95
MY-014-GS G.Skill 2GB DDR2 NR PC2-6400 (2x1GB) CAS5 Dual Channel Kit (F2-6400PHU2-2GBNR) (MY-014-GS)
£114.95 £114.95
CP-128-IN Intel Core 2 DUO E6600 "LGA775 Conroe" 2.40GHz (1066FSB) - Retail (CP-128-IN)
£214.95 £214.95
Subtotal £466.85
VAT £81.70
Total £548.55
That leaves £100 in the budget for a better motherboard. Might not be enough though, I see the conroe mobos go up to £150. I don't really know enough about them to recommend a good one for overclocking though. The E6600 has extra cache as well as being faster, it looks to be the most popular conroe at the moment. If you aren't OC'ing you can get the cheapo £50 mobo into that budget, drop the ram down a speed and bump up the graphics instead.
Losing any real chance for some decent overclocking, you could get this (£30 over budget though!). Although the X1900XT is mega overkill if you don't play games.
REFERENCE DESCRIPTION QUANTITY PRICE COST REMOVE
CP-128-IN Intel Core 2 DUO E6600 "LGA775 Conroe" 2.40GHz (1066FSB) - Retail (CP-128-IN)
£214.95 £214.95
MY-012-GS G.Skill 2GB DDR2 LA PC2-5300 (2x1GB) CAS4 Dual Channel Kit (F2-5400PHU2-2GBLA) (MY-012-GS)
£99.95 £99.95
MB-163-AS Asus P5VD2-MX Micro ATX (Socket 775) PCI-Express DDR2 Motherboard (MB-163-AS)
£44.95 £44.95
GX-112-SP Sapphire ATI Radeon X1900 XT 512MB GDDR3 AVIVO TV-Out/Dual DVI (PCI-Express) - Retail (GX-112-SP)
£219.95 £219.95
Subtotal £579.80
VAT £101.47
Total £681.27