This is all very interesting. Before we bought our Ht3's I was concerned because of the 29hz F3, since our then current speakers of 15 years were probably "+" at 20hz.(slopy and muddy for sure, but part of the dynamics, the tonal balance, the foundation.....) Talked to Pete in Denver, there was a thread dedicated to my concerns. Many expressed their opinions; "nothing there", "don't need response below 40", etc, but one guy did use subs with his HT3's, and Dennis Murphy validated the " part of the dynamics, the tonal balance, the foundation" piece. It's all pretty funny.
Now we have the "G2 sizzle".............
I'm not knocking the HT3's. They do most everything pretty darn good, just go in a store and take a listen (and look). Or look at what the cost can be taking things to the next level, the HT4.