You need to send Rich(f107plus5) a PM. He is the m3/m50 expert around here. I don't personally know how the two compare, but I believe that the m50s are the m3s that go much lower. One suggestion that I have would be to order a pair of m3s and a pair of m22s, and you could send the pair you like the least back. If you really like the m3s, you could get another pair and use the second pair for the rears, add a sub and center and you would be flying high.