I just put in a black Tuffy Series II console (Part number 040-01). I chose that one because I'd rather have the storage space in there than a sub. I also got the full console, so everything matched (as opposed to just the rear box part).
TJ Series II Security Console for Jeep Wrangler, TJ, Unlimited LJ
It was a pain in the ass to put in, but now that it's in, I absolutely love it. The quality of the lid/lock is excellent. Waaaay better than stock.
Plan on taking out at least one front seat (I had both out anyways), go slow and take nice deep breaths. I used to fly cargo in old crappy airplanes all night to all sorts of crappy places, so I developed quite a vocabulary that I've since been good about keeping to myself, but putting this thing in had me stringing words together like the good old days. I think the whole neighborhood was plugging their kids' ears. But as I said, now that it's in... it's sweet.