Assuming you're running all green drives, that's probably more power than you need, but there's nothing wrong with it.
the only other options are 650,750 or 1200 watt I am looking for a efficent psu that can handle when all drives are running and is efficent at the converting
next month I need to get the last few things for my build I have almost the same build as this http://lime-technology.com/forum/index.php?topic=12822.0 I am planning on from now on to get 3tb drives. what about this for a psu http://www.corsair.com/power-supplies/modular-psus/professional-series-gold-2/ax850.html