EcoTech Vortech MP40w
I initially bought this as an mp20 about 5 years ago and run it on a previous tank. I bought the driver for an mp40w from someone who upgraded theirs to an mp40wes. I bought a separate upgraded power supply to run it as an mp40. That was about 2 years ago. In all honesty, I have never had any problems with noise or breakdown with my pump in all the time I've had it. It has served me well. Great pump!!