I'll echo the comments from @bdp24 but with a little more enthusiasm because my upgrade was actually from an SVS SB-2000 to a Rythmik F12G. The lighter weight paper cone with the servo motor tech is extremely fast and articulate, all the way down into the teens hz range. It can reveal sub bass textures like a very high end floorstanding speaker. It's faster than the aluminum cone version, and that's why I went with it. It moves less air, but I greatly prioritize music quality over movie soundtrack quality. I use a large gauge solid OCC silver power cable with it, and OCC copper interconnects.
Also, read up on or watch the video of Danny describing the numerous options beyond the ordinary on the PEQ amp. You may not think you'll want them until you realize you do.