Personally, I find the specs speaker manufacturers provide quite useless. With amps, I like more power than less as more power sounds more real to me.
In mating amps and speakers, if one stays within the same brand family, does it make sense to spend more $$$$ to get more power when one already has seemingly enough power? For example, if one gets great sound from a pass xa30.5, does one get better sound with xa160.5? If one loves the xa160.5, would getting xa200.5 give better sound? Is the ARC 610 that much better than ARC 210? I imagine the sonic signature stays the same, but do better parts (and more parts) improve the sound, or do they hurt the sound?
Unfortunately, most dealers don't carry multiple models of amps. Thus, comparisons are hard to come by. What are the diminishing returns? Are the more expensive amp the better amps? What are all of the factors to consider?
Looking forward to your responses as I'm running out to hear some live jazz. Thanks!