All the subs we have heard to date would be your EP600, A Hsu STF3 Mk2(Not sure if was mk2 or mk3), My old piece of ...., your Sony, the EP400, the Velodyne DLS-5000R, The EP350v3 and now the PB12-NSD.
I have also heard the Paradigm DSP3100 which I liked quite abit, and it sounded much closer to the EP350v3 only it couldn't pressurzie the room nearly as well as the 12" driver but it did come close and it is a bit less than the EP350 at $599.
Fred, if the EP400 hurt your ears you wouldn't want the PB12, but the PB 10 might be better as the 10" won't pressurize the room as much. I would recommend you have a listen to the aforementioned DSP-3100 at your local Paradigm retailer, I think you might like it very much. I am still trying to get my dealer to let me try out a DSP-3200 it has the 12" driver and 100W(I think) more amp, but it is actually slightly more than the EP350, the DSP-3200 is $799. The Paradigm subs have an upper cut off at 150hz like the EP400.
I am leaning very much towards bringing in the big PB13-Ultra, mostly just to hear it, as all the reviews of it say it is one of the best out there. It would be over kill for my room but it would be the last sub I should need if I ever move into a larger house or make my room bigger. The FR is flatter than the PB12 - NSD so it would be interesting to see if it still has that thump to it.
