Thanks for the replies and advice everybody, most helpful. I've decided on spending about £400-£500 for mobo, CPU, Ram and GPU. Rest of my hardware should do, though maybe a new PSU if needed.
vrlsktry,
Thanks for the links and suggestions.
Parapunter,
When I first built the PC a few years ago I stuck with the onboard sound and never noticed any problems until it eventually died, when I installed a sound card the difference was impressive. I'm not much of an audophile but generally will always be playing music off it, so I'll be transferring the new card over, assuming it works.
XV105,
Cheers for the info, though I'm not looking for anywhere near the the terabytes of storage you have

Trouble enough keeping junk to a minimum with 160GB.
I'm running a Samsung 20'' widescreen at 1680x1050 from the desktop so a beefy graphics card is required, though the more I speak to the more confusing it becomes. One highly recommends the 9800GT GX2, though the ATI 4870 seems to have impressive reviews too.
Undecided whether to go for Vista or not. Currently running the laptop on Vista for almost a year and had no real problems, though it's only ever used for the net, Word, watching DVDs etc rather than any gaming or editing.
Saab Dastard,
I've been looking around again at buying brand/non brandd PCs, though decided to have a twiddle at building again plus can concentrate the money on the areas I want, if that makes sense.
Thanks again
