First I would suggest the 125 or 180 over the 150. The 150 is the same tank as the 125, just taller. the 180 is 24" front to back and a much better footprint for a reef. I'm assuming you want a reef because you are inquiring about a wave maker.
As for power heads, what are you looking to spend? The controllable koralias are ok. The vortechs are nice too.