if you shop at Novatech & Dabs, then they are probably the best ones to ask (apart from PCA forum members of course)
as JamesF says if you arent a big gamer then go for a all in one motherboard (preferably one that takes DDR & SDRAM memory), best value for money, use your old case/power supply (as long as it isnt a slimline DELL or COMPAQ etc), use your old memory, just buy a new motherboard and processor.
im not gonna start saying which to buy but there are some good deals out there (ASROCK, ECS, MSI, to name a few).
Thanks for that, I use XP Pro for general home use, surfing, card games, some graphics, photos etc.
Thought about a new case with power supply for about £20 just to renew it.
Did have trouble not so long ago with overheating PSU fan stopped, it doesn't seem the same since, something still not right but hard to put finger on what, have renewed the obvious bits but have got to the stage where I think what the hxxl, do a full job.Go faster etc.
Then just for the home user a 2400+ Athlon or a 2.4Ghz Intel is ok, especially take some care on the memory, get good quality 256mb or 512mb DDR for XP. If you require more go for a 2600+ Athlon, becuase they are cheap, cheerful and powerful, or an Intel P4 2.66/2.8GHz. 512Mb is great for a power system, no more is needed. PC2700 is a safe option becuase it is reliable and not new technology!
Go for a good Graphics card, avoid Onboard. Just a basic one such as a GeForce 4 440 128Mb DDR one.
If you need more for games go to an FX5200, but you could even go higher if needed, but these two cards are a great improvement over Onboard.
A standard 60Gb HDD is ample for home users, but 80GB is a safe choice.