I'm curious about the SVS Plus 12.3 Series Woofer Upgrade. I wasn't monitoring the forums closely enough when this came out and totally missed it. I have a pair of 16-46 CS-Plus subs with a Samson S1000 that I bought in 2002 and use them each with one port plugged. With the BFD I get a pretty flat response with a rise of a few dB below 20Hz. I'm sure I got plenty of headroom and have never even come close to pushing them. I could probably get by with one but I figured why not have two because it's not like you can have to much. And I know I'll never be left wanting with this setup. So what is there to gain from the update? Are they quicker or more responsive? Better/tighter bass? I got no complaints with what I got, but if I could get something better... However if it's primarily an upgrade to increase volume or a flatter response, I don't really need that.