OK,
My flame-suit is on!! :-)
I've used the AM5 for years. I like it. There. I said it.
I use it with a Yamaha center speaker,Atlantic technology surrounds, a couple of generic rear center speakers and a Polk 650 powered sub. The passive sub of the AM5 picks up the midrange sub signals quite well and the cubes direct the L/R signals just where I want them. I know that there is a lot of bashing towards Bose and I do understand it. One of these days I'm sure that I will upgrade but, there is no reason to dump something you already own AND appreciate just because the general concensus goes against them. If it sounds good, keep 'em. You can always demo other systems and change up later.
Trace