Well newegg has a deal right now on a 'APEVIA WARLOCK 1100W' power supply for $110. The deal will probably be sold out soon.

I currently have a Corsair HX-620.

Is it time to upgrade or should I be fine with what I have? Does it perform as well?

ASUS Rampage II Extreme w/ i7 920 OC'd
12GB DDR3 OCZ Platinum
ATI HD4870 GFX Card
ATO X1900 XTX (Will upgrade to HD4670 next month)
Water Cooled
Corsair HX-620 PSU