My new MP40w arrived on the doorstep today. All I can say is wow! It is currently running and I'll be experimenting over the weekend. Will be able to take out 2-3 of the other powerheads. It is very quiet, even running full bore. Don't know if I got a good deal: 419.95 at Reefgeek.com (no tax, free shipping, great customer service). The cheapest I've seen them used is around 350. No regrets so far, but its only been running 2 hrs.