We've got a Supertooth Disco, pretty solid SQ, bi-directional control, can run with a direct connection via 3.5mm audio jack, holds a pretty long charge (easily runs a whole day at 50-75% volume), comes with a nice case/cover.
Bought it over the Jambox after doing a pretty good bit of research, it's a bit bigger, and I believe the Jambox has a mic for a bluetooth speakerphone type setup, but the Supertooth has smoother highs and a little richer bass.
It's probably about a wash in the long run.
Honestly, if you want "loud", and don't need portable, I'd just consider using a BT audio receiver into a full sized audio setup (amp/receiver, speakers), or even better use an AirPlay compatible setup (AppleTV, AirPlay receiver), and you won't have any range issues (at least in your house).