AnandTech has published a review of the OCZ EliteXStream 800W and 1000W power supplies:
OCZ's latest product is their EliteXStream power supply series, first introduced at CES this year. Shortly after the show, we had the chance to have a look at two production samples rated at 800W and 1000W. This new series is the first result of the OCZ and PC Power & Cooling merger following the acquisition last year. The EliteXStream series launches as the new top-end brand from OCZ, providing a high quality experience that we will see later. The target market is higher-end enthusiasts that have a need for greater connectivity and top quality. One look inside tells us what ODM is at the heart of the design, which dimmed our expectations a bit, but we ended up surprised by the performance these two power supplies delivered.
You can read the full report over here. The reviewer says both PSUs performed pretty good, with the 800W model hitting an efficiency of 86.21%!