I'm in Tireguy's camp, I've never heard a sub that seamlessly integrated with the satellites. This is not to say that I've never heard a satellite/sub system sound good (like Pipedreams and Airfoil), but there was always a discontinuity and or muddiness between the low bass and everything else.
It's a matter of degree and priority. Some are more than willing to compromise seamlessness for low bottom end. I'm happy at 35 hz. In 18 years of listening to sub/sat systems, my experience has been "honeymoonish." That is I hook the sub up and it sounds fantastic, but after awhile (one week or two) something is amiss, like a muddiness or an afterthought. And, low and behold, once I take the sub away the music gets its' life back. Then the cycle repeats, though a lot less now than before.
I think that if the speaker system was designed around using a sub, then it may have a better chance of sounding more seamless or less discontinuous depending on how you look at it.