M5HPs all the way particularly if you plan on listening to music in surround.

If you can set up your front speakers symmetrically in the room and you don't have much covering your walls, you may not need surround for music. I don't with my M80s. The effect is amazing with well-recorded music.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated