Thanks for the quick reply! I'll look at the ATI and Parasound. I thought the Carver AV 505 would be good, but it is 17" deep. Somec59, forgive my ignorance, but what do you mean when you wrote "don't be put off by power ratings"?
I'm looking for a used 5 channel amp
My problem is limited shelf depth. The shelf is only 16 inches deep. 50 watts a channel should be enough to drive my Cambridge Soundworks front speakers and Klipsh in ceiling rears. I suspect my Onkyo receiver (50 watt) isn't strong enough and hope to get better sound with components. Any suggestions are welcome. I've never owned anything but mass market gear and am not very knowledgeable.