Registered: 11/16/07
Posts: 1816
Loc: Florida, USA
Most cases come with a power supply but I wouldn't trust it. Most cases come with a cheap off brand power supply and ether die with in a year or isn't enough to power the whole system.
Here are the main brands to look for.
Ultra Logisys Aerocool Thermaltake Zalman
If you want to go cheaper use Rosewill. A lot of people don't like Rosewill but every power supply I have used by that company has worked fantastic.
Only reason why I mentioned the SSE3 thing is for just in case if some one else decided to follow this thread to build their own but using sub-par hardware.