the wave modes (blue) are overrated IMO. I have two MP40Ws on my 75g and have them both on reef crest mode and have them tuned down. I get virtually no noise from these pumps. You only start to hear the noise once you get close to 100%, mines dialed way back and still creates great flow. I think these powerheads are great.

I would definitely get 2 and install the controllers right next to each other so they can communicate. I have them both on the orange mode (not sure if thats sync or anti-sync, i forget).

If you're still into creating that wave, especially seeing the corals rock back and forth quickly, go with a tunze wavebox. Makes me nauseous to see the tunze wavebox work, but looks like it does its job.

I think the pink mode in anti-sync is better than the blue mode. You can create a gyre effect in the tank if you set it up properly.