Hey Tony,
Some food for thought,
I just picked up a couple of Aquaglobe Micro powerheads for my tank.
The little suckers are about the size of a kiwi fruit and pump out 300gal/hr.
The nozzle rotates 360 deg and flow is adjustable.
Very happy with them so far and you can barely notice them in the tank.
Check out the site at
www.aquaglobe.com
Scott