A friend of mine has a Rhythmik F12 sub with the Aluminum driver paired with his Magnepan 1.7's. The sub sounds great and musical. No boom or muddiness. Very controlled deep bass which integrates well. Personally, I do not like paper drivers. My friend talked directly with Rhythmic and they recommended the Aluminum driver to pair with his Magnepans. Rhythmiks easily compete with subs costing hundreds more. The only reason I did not buy one is because a found a great deal on a used Martin Logan that was too good to turn down. If I decide to upgrade, it will be with a Rhythmik.

I own a Martin Logan Original Dynamo sub, 10". It also has nice tight musical bass. Sounded better than any REL or Velodyne sub I heard selling for $1200 or less. It integrates well with my Maggies.

I have also heard the SVS SB 2000 sealed sub at Best Buy. Awesome sub for the price. Tight and musical. I don't think that there is a better sub for the price.

I prefer sealed subs for their tighter bass, especially for music.