How close from the TV are you? From what I hear the VP-100 is fine if you're about 8' or less from it. I think the main difference in sound between the m2's and m3's is that the m3's are a little warmer while the m2's are a little more detailed and clear. Also, as far as subs go, make sure you check out HSU (hsuresearch.com).

Fight on 'SC! Three-Pete Baby!