After looking around a lot more I decided on the Outlaw Audio LFM-1 Plus. I figure I can "pull the plug" if the deep bass gets to me. It looks as if it's actually more accurate than the SVS subs as far as a flat frequency response goes. With the plug installed it's +/-2db 18-180hz. I think it's a really good deal for $550 shipped. Might go nice with their new pre/pro whenever they release it.
One of the reasons I was so interested in the svs cylinder designs is that they're down firing. Somehow that just really seems like a good design to me. This one is a down firing sub as well so that was another reason to like it.
