Most Musical Subwoofers?

I was wondering if any one had used/heard the Legacy Audio Extreme HD? Anyone compared these to JL Audio F-113 or F-112s? I'm considering adding subs to my system as my room has a suckout at about 40 hz that I'd like to fix.
Thanks in advance for any info/experience you might have. I'd be glad to discuss/talk over the phone as well. Send me your phone #.
Good listening,
Sgr, take a look at my review of the Martin Login Subs that I use in my system here on the Gon for the details regarding their sonic performance. JL Audio, Rell and others get great mention, rightly so, however the new generation of ML subs has some very interesting features and is priced very competively. E-mail if you want to discuss.
If you have a large room you may want to consider 2 subs. (This was just discussed on a earlier thread). I have had great results with Rel over the years.
Good luck,
Another strong vote for Rel. Completely musical with the ability to be seamlessly dialed in to your system.