Thanks for all of your inputs. You have summed it all up quite well for me. Therefore, one, I will go with the S/510; and two, I will consider multiple subs. But that'll get quite expensive. As for my speakers, they are as follows: Thiel CS2.3 (main), Thiel SCS3 (center channel) and Thiel Powerplane 1.5 (surrounds). I recently acquired the Powerplanes and I'm looking for the right Bryston amp to pair them with (unless a great deal on a McIntosh comes along). Why Bryston, you ask? Well, all of my other amps are Brystons.