Have you ever owned or heard a properly installed audiobahn?
They're not an SQ woofer, but I wouldn't say they sound any worse than most SPL woofers. Where else are you going to find a solid SPL woofer that will post these sorts of numbers with less than the recommended RMS power, and a reasonable price to boot?
Oh yeah....I beat out three 12w0's in a ford aspire (sealed box), two 10w3's in an integra(slot ported), and a kicker L712 in a sunfire (slot ported), all professionally installed by either Hart Audio of Albany Ohio or H & K Sound of Jackson Ohio, with my self-installed "143 db fart".
Don't rag on my equiptment. I didn't install it to make you happy or impress you. I was simply suggesting to this guy that it's a good SPL sub, especially for the price. If you can suggest something in the same price range that will hang with the 'bahn, feel free. Otherwise, don't waste my, his, or your own time.