I'm looking for a four channel amp to power my front and rear speakers. I have MB Quart components up front with an RMS range of 40-100 watts and Kenwood eXcelon 6x8s in back with a recommended RMS of 55 watts. I want an amp that is highly adjustable and correct me if I'm wrong but I thought a 50x4 RMS would be preferable. Cost doesn't matter. It just seems that all the really good amps are much higher powered than I am looking for.