I've been hinting that I am going to include or transition over to bands for my next round of P90X. As such, I wanted a good set of comprehensive bands with various resistance and anchoring capabilities.
My friend @georgevhulme (Twitter) recommended the T.O. branded BodyLastics units. I ordered a set and they came today. The nice thing about the bands, besides the quality construction, is that you can add resistance by clipping multiple resistance bands together at the handles, which I like very much.
I'm looking forward to working out with these to see the real difference they make in, say, the back & biceps routine.
You can find more info on the bands here. In the same way you ignore the creepy infomerical ads for the Beachbody stuff, you can ignore a lot of the fluff you'll find there also ;)