Thanks for the info T.R. Those Rockford Fosgate Punch amps sound like they are good quality, I'll see what I can find. My home stereo system is 100W, which was one of the highest wattage system you could get at the time (hope I'm not dating myself too much...but I know I am), and it sounds just fine. I really wonder, at low/decent volumes, if you can tell the difference between a 100W and 500W system? I doubt it, at least for my 'old' ears...!
I'll report what I find and/or measure, might help others looking to do the same thing.