Ronrags, If sound quality is of prime concern, you may want to consider the larger amp because it will undoubtedly have more current to drive ur speakers. This translates to greater control of the drivers which in turn means greater authority and inner detail of sound...especially at lower volumes. The sound coming from the speakers driven by 200wpc will sound more effortless than with 100wpc. (Given the same brand of amps, which in this case is Classe) Consider the efficiency and load of ur speakers. i.e.,...87db/4ohm, etc. This in part should be ur guide as to which amp you choose. It's not so much about how loud ur speakers will go, but more of how effortless the information coming from ur speakers will sound at either low and/or high volumes. There's nothing worse than underpowering ur system. The higher current will allow u to hear the full potential of ur system upstream as well as ur speakers.