I'm pushing mine with a 200w Sony integrated amp I got for free at a yardsale because the LCD display doesn't work.
I haven't had the privledge of hearing a correctly designed IB with 4 or more speakers and 1000+ watts. I'm sure they are mindblowing, but I am completely happy with this for the price.
and of course the mains are more clear being relieved of bass duty.
I have rattles in the room that I never had with just my mains.
Now I have to chase them down and silence them before I can even push it hard with just 200w.