here's a couple good threads to find a replacement super-woofer for you :D they have the H2 on here.

http://www.icixsound.com/vb/article.php?a=13 Listening Evaluation
http://www.icixsound.com/vb/article.php?a=13 Vented Output

and then just some other stuff, I couldn't find everything, this is just what I recall from when I still visited that forum..

ED amps MECA record
http://www.icixsound.com/vb/showthread.php?t=18564&highlight=record

and then instead of sensitivity and theoritical FR tests like a lot of guys do, they do actual in-car tests
http://www.icixsound.com/vb/showthread.php?t=12483
compared the 15AE (their old flagship) to the 16Ov2 (new one)

this is a test of every single sub they make, from the 9" to the 16"
http://www.icixsound.com/vb/showthread.php?t=12788

same thing in a sealed box
http://www.icixsound.com/vb/showthread.php?t=12785

and then another one
http://www.icixsound.com/vb/showthread.php?t=12458

All those measure real-world peak SPL the same way they would measure it at the dB Drags or other sound competition, and then the same thing for frequency response. All of eD's subs can go 10-100Hz with less then 0.5dB variation :D ...even the 9"!

I would definitely recommend the 13Ov2. If you look at the SPL test of all the other subs and then the SPL tests of elemental's stuff, you can see that some of elemental's subs are overall louder then the subs from big manufacturers that cost three times as much :D