I was going to get the OCZ ZT 650W but it's not as good as I thought http://www.hardocp.com/article/2011/12/20/ocz_zt_series_650w_power_supply_review/9#.UphJ0tJdUrU is there a better power supply for a similar price? How good is the XFX 650W compared to the OCZ ZT 650W?