I concur with I. Greyhound Fan. If you can audition a pair of 2.7i, do it! That ribbon tweeter is excellent!
I have the 3.7i and a pair of Rythmik F12G subwoofers (started with 1). They are integrated to reinforce the low end but there is no boominess.
Incidentally, I visited a high end store recently and every setup/room had boomy base (to my taste), including the Martin Logan's; so I can understand your approach to bass.