I wanted to wait and see if my initial impressions held up before writing this... 4 weeks ago I purchased a PSB Subsonic 6i sub to use in my HT system, planning to move the SVS up to my stereo system to augment my Stratus Golds. I made the move, and noticed that I was liking the bass much better from the PSB sub. It seemed to be more articulate, and 'faster', if that word can be used to describe bass. At the time, I was happy with the extra weight in my stereo system that the SVS provided. I'll bet that the SVS measures better as far as max SPL's go, though that is not an issue in my smallish(12x13x8) HT room. And I'm sure that it is also capable of going a few Hz lower overall. But it just doesn't sound as good as the PSB. I wish I could better state what exactly it is that I like about the PSB's sound, but I can't. 'Cleaner' certainly comes to mind, and not the least bit boomy. At the same time, it seems to have more impact. I guess there is more to a sub than the way it measures- that is certainly true of loudspeakers in general. The PSB has raised my enjoyment level a notch or two, that's for sure. I was quite surprised at this result; I was able to purchase the PSB at a ridiculously low price, and was planning on selling it when I bought my next SVS. Now I'm keeping the PSB, and plan on trying it out in my 2 channel system next. I'll let you know how it fares. The PSB Subsonic 6i is a worthy contender in the sub arena. Some of you might want to give it a listen. Perhaps there are some test results out there that bear out my impressions. PS- Both subs were calibrated to similar levels, and placed in the same area.