Brian - I've read your review of your SVS B4 Plus. I appreciate all the work you put into it. I noticed in your review that you have Nautilus speakers. Which B & W Nautilus' do you own? I have 803's for my fronts, HTM1 for my center, and 804's for my rears. I've been looking at the new Nautilus ASW 800 or 850 as my choice for a subwoofer. Have you listened to either one? After reading your review of the B4's I showed my wife pictures included in the tread. My wife isn't pleased with the size of the B4. She's not sure she even wants a subwoofer. Do you think the B4 will be to overwhelming? Do you think two 800's or 850's would do as good of a job as one B4? The B & W's both have 1000W built in amplifiers. The difference is a 12" vs. 15" Woofer. Thanks for your feedback.