This may be a dumb question, i know the value of having a timber matched speaker system. I currently own a Klipsch RF-7 speaker system. All 7 of my speakers are timber matched. I currently power the speakers with an Onkyo TX-SR-900 reciever. I have been looking at an Adcom amps on ebay. i want to drive the fronts with more power (200 watts a channel vs 110) for more dynamics and a cleaner punchier sound at lower volume levels when im listening to 2 channel sources.
if i do this will the fronts overpower the rest of the system or sound tonally different when im in surround?

ive been looking at two different amps one is the GFA-555 the other is the GFA 5503.