My 20 watt a channel Jolida is doing quite well powering my Vistas in a condo. Given the speaker's claimed sensitivity of 90db (and disregarding the speaker's own dynamic compression) 20 watts should be good for over 100db, that's pretty loud.
I wonder how loud some of you guys are playing your speakers and in what sized rooms. I also wonder if some of the big amps used aren't producing more heat than sound.