If you can make it work I'd recommend you use the same 3 speakers across the front instead of going with the VP series for center. You can go either all M22's or all M2's or as a 3rd choice L&R M22's with M2 center. I don't know your space and budget limitations, but also consider the full book shelf size on a mounting bracket instead of the on-walls if it's an option for you. The on-walls are great (I have the in/on walls) but the full size is better.
For surrounds I highly recommend you look at the QS series instead of M2's for surrounds. I have no experience with height channel speakers so no comment there.