Very nice system. And, the benefits of having a dedicated listening space can't be overstated -- one where things can be placed where they want to be vs. where they need to be to coexist with other things. Regarding subs, I've achieved exceptional results using a pair of Vandersteen 2Wq's together with my MG 3.5Rs. They are running in balanced mode and take their inputs from the amplifier output. I purchased Vandersteen's optional high-pass filters (which are highly configurable) and have been unable to improve on the recommended setup. My system is a few pages back in this section and is under the heading "Sanctum Sanctorum".