i think the kestral hot-rods are wery nice, but not the most detailed speakers in the world - prolly why yure getting better luck w/the rotel over the c-j amp: decent detailed solid-state vs tubed euphony, not the lack of power. subjectively, the c-j would actually play as loud or louder than the rotel, i'd bet. i'd look for the most bright, detailed, forward-sounding amp ewe can afford, to match w/these - something like an older krell or spectral. as 50 wpc should be enuff, it should not be too costly...i heard 'em driven fine w/a 55wpc alchemist amp...
doug