My wife recently told me that the speakers were "too good" because during a movie, she thought one of the kids fell off their bed upstairs.
I have the bookshelf DV62si all around (6 of the 7.1 channels) and a DV62cls for the center. My family room is a rectangular room of approximately 13.5 W x 12 L x 8 H. All the speakers are mounted on the wall up close to the ceiling with them tilted towards the sweet spot (main seat).
I'm powering the 3 fronts with a Rotel RMB-1066 in 3 channel bridged mode and my Marantz SR6003 does the rest. My sub is a JL Fathom F112.
Definitely better than my previous Athena As-F1 / As-B1 / As-C1 / CV CLS15 sub / Pio VSX-1015tx combo (in a room a little more than twice as big, though).
After running Audyssey, I find the Venturi speakers very life-like. I also found them very clear, with crisp sound effects, even without having to turn up the volume. It may have something to do with the amp, sub, and receiver upgrades, but I have another set of DV62si speakers upstairs connected to a tube receiver (Fisher 400 with 7868 tubes). They sound very good powered by those warm tubes.
But I agree with all those who advised matching at least the front sound stage with at least the same family and brand of speakers.