Just a couple points. I believe theres some good advice to be had in this post from a few people, but maybe some other considerations too. For one, i think the gx280's come standard w/ a 250-350watt power supply. Not ideal for a 9600gt card. I think the preferred watt. for those cards is 400-450. So you may not be running that card at peak performance. Also one posters advice about heat is important as well. Beefy cards create alot of excess heat in ur tower, so if u do choose a larger power supply, then make sure you have the means to cool it down. Some tips... make sure you set your towers apart from one another as most of the displaced heat (w/ a well-coooled machine) is collected on the exterior of the tower, ie. near the power supply and g-card. On another note, I am personally of the single pc mind-set when boxing, if you choose to play other games where boxing isn't ideal or possible, then you'll be glad to have one really solid machine rather than a decent one w/ 4 worthless slaves.( unless you're playing cod4, watching youtube, e-filing your taxes, e-mailing your grandma, and looking at porn all at once =P) Anyway, just my opinion on those issues, but all around pretty solid advice from the posters. =)