i37 broke my PC.

[VoX]

I'd put a bet on the PSU then, luckily it was after i37!

THIS PSU should easily be up for the job, it's modular, and cheap.

Changing a PSU can be hard, just plug in the cables on the new PSU straight after you plug in the ones from the old PSU so you can see what goes where and that should make the job a lot easier.

[Calneon]

THIS PSU should easily be up for the job, it's modular, and cheap.

That looks very suspect, very low price, very high wattage, and modular. I just screams, 'I'm made of cheap low quality components'. 800 watts for Chaz's PC is totally overkill anyway.

This would run your PC fine, however you would need to buy a new one if you wanted to upgrade any other components. This would also be fine but it isn't modular.

This Antec PSU would be fine too.

It might be worth spending a bit more on a higher wattage PSU so you don't have to buy a new one when you upgrade, in that case it might be worth buying the HX520, I've had one for 2 years and it's currently running an i7 920 and GTX280 with no problems.. I've also heard good things about the PC Power & Cooling (ignore the generic name) PSU's, this one in-particular would be a good buy.

Hope that helps if you need to buy a new one!