I have used both in the past. On my new tank build (~270 gallons) that is still in progress, my plan as of right now is to use 1 or two gyres, 2 mp40s. I was thinking testing out the neptune WAV's and see how i like them. If sound is an issue, can you just turn the pumps down whenever you are around and then ramp them up at night?
I also like seaswirls. They are very silent and you can push a lot of water through them.