Hardwarecanucks posted a review of the OCZ StealthXstream 600W power supply
A quote from the article:
OCZ StealthXstream 600W Power Supply Review
A few months ago it was ludicrous to even think of the possibility of a quality 600W power supply which retailed for under $100. We can do nothing but applaud OCZ since they proved a great price does not equal lackluster performance by delivering power supply which performs as well as its more-expensive competitors.
OCZ StealthXstream 600W Power Supply Review