I've used a OCZ ModXStream 600W and had no probs (except case compatibility when you have the fan grill on). Function wise it should be alright.
Here's a 'tiered' list of power supply brands and models to help you choose yours if you have second thoughts about OCZ:
http://www.eggxpert.com/forums/thread/323050.aspx
BTW, avoid Antec at all costs. They made some of the worst cases I've ever worked with.
Why? Shit build qualitty, tons of design flaws, no wire management possiblities, expensive, looks like dick, and the list goes on.