I'm looking at replacing my Cambridge CXA81 integrated for a more higher end amp. I've noticed that some amps, like McIntosh, have lower damping factor ~40. Where some other amps have a damping factor 400-500. Is there an ideal or a minimum damping factors for the ELX towers? I see some people say that any damping factors over 40 won't make a different, while some amp companies tout their very high damping factors. does it make a difference and will a higher damping factor better control the speakers?