I think alot of people miss the whole point with the W7...
It isn't meant to be the loudest best sounding sub in the world. It is however one of the most unique subs in the world. Just about every single part of the sub is completely custom, no off the shelf stuff used. Most internet companies are using mostly off the shelf items to build their subs (although the new RE sub is looking very unique, but I can still see some off the shelf parts on it). Not saying that makes the W7 better than the other subs or anything, just that it was built to make a statement, plain and simple. Its supposed to sound good, and people like Tom Nousaine, very acredited reviewers, have backed that up. If you put it in the hands of someone who knows what they are doing, they can get stupid loud (quite a few W7 installs at the top of their classes in MECA I know of and a few other leagues as well), and just looking at the sub reinforces everything else.
If money were no object and I could have any sub I wanted, it wouldn't be the W7 though. I'd go with something a bit more rare, definantly something capable of amazing IB results, probably something like the Oz Audio 200Ls I think they are, or something along those lines.