I also would find out what is wrong with the computer, the first thing i would do is replace the ps, but just make sure that you can return the ps without getting a restocking fee just incase that doesnt help.
If you do plan on upgrading i would go with
abit kn8 sli. I would stay away from ibm/hitachi hd's. i like maxtor and wd drives. i would keep the hd you have atm unless you are running out of room on it. I wouldnt get less then 1gb memory for whatever board you end up getting.
As for the pci-express video cards, it comes down to what price range you have and if you want a dvi or vga card. I would get a
dvi card , you can always get an adapter cable. (I have some if you would like one).
Also i would hold off getting xp and wait til vista comes out expecially if you get a 64 bit processor.
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"Parents have forgotten how to be parents" Aaron Lewis
"Get your ass back here, your a white boy walking thru the ghetto" - at the end of a bachalor party said to the bachalor while walking home.