Allo Again. PC has still died the death.

long time no post =)
Sadly My home computer is still dead to the world it has resisted all attempts to resurect it. I have to say that this is not through a lack of trying to fix it and grateful thanks go to a friend who has been helping me on this as I still would'nt have any idea what was wrong in the first place if he had'nt helped me.
I have regretfully come to the decision that I need a new tower as my PC was bought in 2001 it has become difficult to get replacment parts ( I have been informed that the industry standards have changed.) There is the possibility of e-bay but I have no desire to risk money when the PC may still not work at the end of it. My software engineer of a cousin has reccomended buying a new Tower (only the tower as my monitor is still fab) this has yelded suprising results as in order to replace all the broken parts with the equivelents (to be able to run heavy graphics) it would cost me about £500 ish whereas if I get a base only deal from somewhere like PC world its only going to cost me about £300 and I can upgrtade that to be what i want for about another £100.... still less than the repairs were going to cost. Wierd.
On another note I have lots of work to post but until I solve the PC dilema its not going to get here anytime soon... well maybe this weekend I will get something organised...

Any recomendations for the PC dilema?