I have been upgrading my living room HT over the last few months: Aerial Acoustics Model 9s and CC5 center, Parasound Halo A51, Denon 3808. The living room itself is not that large, but it is open to the dining room, kitchen and second story loft area. I presently have the PB12 Ultra/2 and am presently considering dual PC Ultra 13s (space contraints), dual F113s (wallet constraints), and the new and promised offerings from Epik.
I am happy with the impact of the Ultra/2, my question is trying to quantify the improvement I could expect in SQ from either of these subs.