Corsair TX 650w v2 for $79.99, but I think the sale ends tonight.
Corsair Enthusiast Series TX650 V2 Power Supply at Memory Express
Antec HCG 620w $69.99
NCIX.com - Buy Antec High Current Gamer 620W 48A 24PIN ATX12V V2.3 Active PFC 80 Plus Bronze Power Supply 135mm Fan - Antec - HCG-620 - in Canada
XFX pro650w core edition for $74.99, but $44.99 after $30 MIR
NCIX.com - Buy XFX 650W PRO650W Core Edition Single Rail ATX 12V 53A 24PIN ATX Power Supply 80PLUS Bronze PSU - XFX - P1650SNLB9 - in Canada
Other models that are a great bang for buck in that wattage/price range depending on sales are Antec neo eco 620w, Seasonic S12II/M12II 620w, Antec True power new 650w.
Of the links I posted I would go for the XFX for the 30 MIR, but they are all good power supplies.
I would take any of these models over the OCZ