I bought a G-K MB110 combo earlier this year.. I didn't need loud or low, because it would mainly be used in a church basement with a terminal case of "room boom". In the end, I decided that the restricted bass response was too much of a good thing with my 5-string slabs, and went looking for a replacement with a little more oomph down low. Thankfully, some new options have surfaced since last winter, and I ended up getting a good deal on a floor model Rumble 100. I almost passed it up the first time I checked it out, because it sounded pretty boomy out of the box. This time, the salesman let me test it with the ports blocked, and that sealed the deal (pun intended). I think that the Rumble makes an interesting contrast to the G-K, and thus this thread.