I ended up getting the M1's to start. All I could think while I listened to them was, these cost $500?! I've heard many B&W systems over the years that justified their price tag, this wasn't one of them. Really boring sound. Only sounded good with really clear recordings, and even then it was nothing amazing. Otherwise sounded like any old pair of sub $100 speaker.
Then I got the A2+, and all I could think was, what took me so long to get these?! Sound is quite amazing. These little things can really crank too, and look awesome next to my iMac. The bass is really tight, not booming, which I generally prefer, but there are some songs that it felt a bit lacking in that area. But clarity is otherwise amazing. I'm quite happy with these and the size is perfect on my desk.
Now I have to ask, do I try out the A5+ too or just be happy with these?