I have a pair of 604s from B&W and naturally, the subwoofer choice would be the asw675....and the price tag originally didn't shake me. But after http://www.soundandvisionmag.com/article.asp?section_id=1&article_id=478&page_number=1 this review of 10 subwoofers, it makes me think(it says that the asw675 had a stiff price considering what was offered). I was hoping to hunt down something on velodyne, but unfortunately, the nearest dealer is a bit of a drive and I'd do it, but I might be able to accomplish a subwoofer easier. The JBL in that review matches up cosmetically to the 604 as close as possible, which is somewhat important for me. Other than the 25hz frequency that the B&W plays louder, the JBL successively outperforms the B&W in almost every spec. It plays louder accrross the range and has a louder peak SPL. The price, according to that mag is $800 US, and the B&W is $1,000 US. I can get the B&W for around $1,000 US, maybe a tad less as I've known my dealer for awhile now. The JBL however, I can get for a little under $500 US. Which to you would be better and more importantly, does the JBL rumble like it says in the review?(apparently a little more than the B&W) If I can spend half the money for oustandingly deceiving and entertaining results, I'd love to.