I recently ordered a JBL ES 250 12-inch sub from Amazon during one of their "lightening deals" for $170 (regularly between $350-$400). I'm pretty happy with the sound, although, since it's my first decent sub, I don't have much to compare it to. (I originally bought a Jamo sub210 8-inch sub at Fry's when it was on sale for $99 to go along with the $149 Jamo 426 set).
The biggest downside to the JBL is that it is huge and takes up quite a bit of room in my small-ish apartment. I'm looking at the Velodyne Impact 10, which is a better size for my room, but I'm concerned that, since it's a 10-inch sub vs. the JBL's 12-inch, that I'll be losing the deep, tight bass I was looking for.
I don't need to shake the walls. I just want tight, deep bass without the muddy-ness that I had with the Jamo sub210.
Any help would be greatly appreciated.