If you got money to spend then go for the Seasonic X 750 / Corsair AX 750.
If you're little more budgeted than those super high quality ones then
Corsair HX 750/ TXM 750 / TX V2 750
Antec TP 750 / HCG 750
Seasonic M12D- SS-750
Thermaltake Toughpower 750