Your reading my mind. I know the Gotham is out of my price range, but look at the specs on it! JL Audio makes world class subz.

I have an F112 Fathom and it deserves a lot of credit. You can likely buy one of these cubes of destruction and wow your friends (and frighten your pets) for around 2000 on Audiogon, maybe less if slightly used. I would not recommend buying one used unless you can be 100% sure that the person shipping it is using the original container AND that container survived the first shipment intact. Mine looked decent but it clearly had to be built like a small safe to make it safely.