Cannata, I don't know to whom you are addressing your post. I actually loved the V2 at a dealer, and the M5, and the Q3, so you must not be speaking to me. I also liked the Mini 2 at three different dealerships prompting me to buy a pair for my system.
People seem to want to compare the S5 to the Q3. Perhaps it is because of price, but I would think that the S3/Q3 and S5/Q5 would be a more appropriate comparisons, based on size and drivers and specifications. Have you compared the S3 to either the M3 or Q3? I recently heard a well set up pair of S5 mk 2s. They and the system in which they were a part, both sounded excellent. As you write, I think I was hearing more about the system than I was about the speakers, yet there are clear differences between my Q3s and this guy's S5s. The front baffle and cabinet construction are certainly different. So are the drivers. The Q3 is a pretty old design by now. They remain very high quality and are extremely revealing speakers. I love the way they sound in my system and room. I also like the Q5 mk2 as set up in my friend's system. I've never heard the S3s.
One guy who owns S3s came to Boston to hear the M3s at Goodwins, and then, on the same day he visited me to hear my Q3s. He is a musician. He told me that the Q3, as heard in my system, told him exactly what was on the recording. The M3s at Goodwins sounded more like music to him. That is one opinion, but it speaks to perhaps different design goals for the two speakers. My Q3s have sounded remarkably different depending on how they are set up in the room.
Alon Wolf describes the differences and advantages of both the Q and the S in the pages of TAS. I think Magico has two lines for a reason, because they sound different. Of course, the Q is slowly being replaced by the M series. I hope to one day hear the M3 in a good system. Congratulations on your new M3s.