£3-400 Upgrade

[Diesel]

Hey, just wanted some advice from you guys, since my current mobo went pop. I've probably got around £300-£400 for a mobo, cpu and gfx. I know its not a lot but I want to improve on:

P4 2.66 Northwood
MSI 865PE mobo
XFX GeForce 6600gt 128mb (AGP)

Any suggestions accepted.

 

[Diesel]

I take it you have RAM?

Aye, hence I said for mobo, cpu and gfx.

How much are my current CPU and 6600 worth?

 

[Diesel]

Would my current Hiper Type-R 480w be Ok to power the upgrade? Would it handle dualcore?