My opinion is that these would be your best bets:
Low Impact Circuit - it has a lot of premixes - it will give you total step, or total weight work - or basically any mixes in between. It's a fun workout, too, and fairly easy to learn.
Low Max - this one is good, but the routines are fairly complicated. If you don't mind learning more challenging choreography, this would be a great workout for you.
Have you considered Kick Boxing? Kick Punch and Crunch is a really fun workout, has a lot of fun moves and is not all punching and kicking. It comes with Legs and Glutes which will give you killer legs (and sore ones for the first few tries!)
Cardio & Weights - it's another circuit with options. It's higher impact, but easily modified and it's fun. The weight work is lighter and not as challenging as LIC. It also comes with IMax 2 - which is high impact, but is one of Cathe's best videos. A lot of people modify IMax 2 to suit their needs. If I'm tired and crabby, and don't feel like working out, I pull out IMax 2 and I always feel better when I'm done. Cathe is just her best in this one.
I would stay away from Body Max 2 - it's a FUN workout. Don't get me wrong, but it's NOT low impact and may be a bit much for you right now. Start with the others, and work your way up if you want to.