Levinson made a pair of very nice class A amps, monoblocks, rated at 25 per channel into 8 ohms....and 50 into 4...and 100 into 2...and 200 into 1..and 400 into 0.5..think they were the ML2 but not sure...one of them is at least as large as the stereo 100wpc 27.5. If a pair ever pops up for sale I'd give them serious consideration; they'll drive anything around probably.
Cut down on your heating bills, too.
Cut down on your heating bills, too.