Mike -
Sorry about that lag. I work the Nutrition and Fitness forums every day, so you'll probably get faster answers over there.
As for what to do next, I'd just go for whatever you think you can handle. If you're ready for P90x, go for it.
And if you want to mix One on One in there, there's no set program,
but here's a really cool primer on how to mix OoO and P90x.