The Muse 160. I have heard all of the ones you list, and chose the Muse. It was designed for unconditional stability into all speaker loads. A really good amp. (I have one that I have listed for sale, but I am its original owner and it's mint, and I think second owners in the current economy may have driven the market down to a price where I'd just as soon keep it. I was always ambivalent about letting it go anyway. You can probably find one for less from someone else.)
