The very narrow, tapered back is pretty cool looking. It will be interesting to see if the base is a tripod like the M6 or something else. Being that narrow, it will need a very stable base to keep it from tipping over.
It clearly looks smaller than the M3 because of the two woofers instead of three woofers. The next question is if they develop an M1, will it be a monitor on a stand or a floor stander like the S1. And will it have a tweeter plus one mid/woofer driver or a tweeter plus one mid and one woofer?
The M series seems to have smaller but more drivers than the S series (M3 v. S3) And the price difference is huge. Do they sound that different? Has anyone compared the S5 Mk2 directly to the M3? How do they sound different?