If you can still find one of the Sherborne IWA-1 amps, they are pretty slick. In wall and RS232 controllable with an adjustable crossover and sub out. I have one in the wall behind one of my TVs hooked to the variable audio out powering a pair of our on-wall Profile speakers. Makes a great little "tv enhancement" system.
I too have had good luck with the Audioshare IWA-50. I have a home recording studio and was driving the monitors with a reference amp. About 2 years ago, I tried the IWA-50 just for kicks. I haven't switched back to the reference amp since.