I was looking at the 175 with the M3's as well, however, I'm don't know if I want to take up the extra space with a sub. The m3's on a stand will use about the same space as the m50 / M60 so I'm now thinking that is the way to go.

Is there anyone who bought the 50's and didn't like them or wished they had bought the 60's? These will be in my living room and as I said earlier, music only. And, don't throw rocks, but I'm upgrading from a set of Bose AM5's that are about 16 years old and the cones/surrounds are shot.