I use a dedicated carpet cleaner vs APC+, have gotten better/fast results doing so. I have been using APC+ for years and yes it is a good product, but I got twice the results in half the time using OPC on the leather, doors, and dash.
I recently bought a gallon of OPC to try for the first time and I'm kicking myself in the butt for not ordering more of this stuff. It is truely amazing! It will be replacing my current APC's
I've been using Adams All Purpose Cleaner & Megs APC+ (4:1, 10:1)
-Adams: Just as good performance...
I would still get a DA to compliment the rotary. Chances are you going to have severe holograms after using the rotary and use the DA with a lighter polish to remove them.