bsatowNot everyone needs that much power or can even utilize it with their speakers or their living setup. Maybe not for you, but I know this would be the perfect amount of power for my home office rig.
bsatowThere's just nothing factual to support this. If you have speakers that run optimally at 100w/channel, the 250w amp vs the 200w amp vs the 150w amp is going to have VERY little, if any, difference in the dynamic headroom necessary to operate at peak efficiency. I agree that a little headroom beyond your speaker's ratings/measurements is important, but 70w of clean power is plenty for a lot of speakers. Distortion is a lot bigger issue impacting dynamics than just rated wpc (which is often rated differently or downright incorrectly by many manufacturers).
I'd love to see some information that supports more power = better dynamics regardless of system size.
trappedintimeAlso depends on speaker efficiency. For example, running a 86 db/w set of speakers using a 1.5 watt SE OTL amp will sound quite different than running it a pair of La Scalas with 105 db/w sensitivity. But again that is my personal opinion. The less efficient the speakers, the more power the better the sound. That is from my personal experience.