What Kind of Powerhead should I buy?

[Eb0la11]

I guess I'll give a little more info. My tank is a 165G DT, reef tank. Lots of sps and softies and everything, really.

Its a 6 foot tank and Im looking for a complete setup for it. I have three korallia 4s right now and then a pump that returns about 1000 GPH through four return lines. So about 4600 GPH right now, though the powerheads def arent doing their 1200 rated GPH as they could use a bit of a cleaning.