PureOverclock posted a review of the Seasonic X Series 750W power supply.

This new power supply comes from the X Series lineup, currently available in 650W and 750W power ranges, and is geared to the discerning consumer that wants excellent efficiency, features, and quality. To be sure, that combination doesn't come expensive, but at about $200 USD, the X Series 750W offers reasonable value for what you get in return.

Seasonic X Series 750W Review