Any GREAT "sleeper" amps?

"Super steal deal" is a relative thing. What is your budget?

I've heard of cats that will sleep on a warm amp, but I am not sure what brand they prefer.

My choice would be Belles 150 ref.---No tubes but you might not miss the aggravation and just enjoy--- Around 1800 used.

Go straight for Nikko amps.
They're built for life and do a very great job for bellow $500. Their power rating varies depends on the model from 100 upto 400Wpc. One downside is that many of them wouldn't drive speakers that go bellow 4Ohms.

I enjoyed Arcams Alpha 10 (about 100 wpc if memory serves) in both integrated and power amp versions. Don't know if the used Alpha's are going at what you'd call a steal though. Good Luck!