thanks for y'all great infor. So, their diff is MDF sounds better, and "real wood" look better?

If so, i would to purchase the regular one, 'coz i think the appearance is just a little plus for me, sound/performance is the first thing first to me.

now, how long will it take to complete the regular M2(or M3)with Boston cherry vinyl/black gril, anyone please?

thanks guys,
Mark