I have my Ventriloquist system temporarily set up in an 11' by 11' room with the Hsu STF-2 sub-woofer. The rear center channel is not wired yet (I don't have a receiver that does better than 5.1 yet) and the main speakers are only about 2 feet apart right now. I need more time to mount the front speakers so they are closer to the recommended positions, but with two little kids, work time is tough to come by.
I have been watching some OTA HD, two DVDs so far and several SD DirecTivo shows. Not much music though.
To my untrained ear, the Ventriloquist sounds very good and are capable of going up to maximum listening volume without any problems in my small room. Factoring in the price, the sound is excellent. I have not really noticed a gap in the frequency range that the Ventriloquist center channel is supposed to compensate for, so it appears to be doing its job very well. Overall, I am very happy with them. Tough to beat the price too!
If you have a small- to medium-sized room and are looking for some good speakers at a reasonable price, you should really check them out.