thanks for the replies and info. I decided just to buy a antec 380w truepower2 ps as well. It will be much quieter then what they have now at least (im always worried about noise in computers). When i built the computer i was doing it on the cheap (built it as a high school graduation present, and had a 2.8 p4 800 fsb, plextor cd burner, enlight case/ps just sitting around as well) and left that PS in to save budget, but all the other fans are quiet allready (zalman heatsink and vantec stealth case fans).
I'll have to find a brush, because ive never actually had to clean dust from the insides of any computers yet, but i did buy some compressed air for it. I've had my computer for three years now, and theres still no dust in it
I'm still gonna reformat cuz itll help, its been almost 2 years now.
Again, thanks for the replies. Its alwasy nice to get more perspectives on topics im not totally sure about.