I frequently stack these two supplements and have had good results with them (bear in mind that I stack nearly ALL the AN line, so results are pretty great anyways).
My experiences:
RPM
Unlike other stimulants RPM provides me with a smooth, focused energy (as opposed to a restless, jittery energy). In the gym I am calm and almost RELAXED. Training sessions seem to move in slow-motion, and sometimes I cannot believe that an hour has ALREADY passed (when it seems like I've only been there for a few minutes). Being an aggressive person by nature, on RPM I can amplify that aggression and channel it into my training, thus providing me with better quality sessions. RPM also adds that much more to my pump and vascularity: The pumps are great, and are painful at times, with vascularity ropes and knots of blue snaking up my arms and legs.
NeoVar Recomped
I like NeoVar Recomped because not only is it a creatine product, but it also acts as a nutrient repartitioner and insulin mimic. Aside from helping with recovery, NeoVar Recomped is awesome to use on high calorie/carbohydrate days. On such days I double-dose NeoVar Recomped pre-bed, and the nest day have none of the water retention or bloating that would usually occur after such days.
Drive was designed to be stacked with RPM and would complement it perfectly (especially if you are looking for more definition or enhanced performance).
Otherwise, Activate Xtreme would stack very well with RPM (I have done this) or any of the other product you mentioned.
~Rosie
Team APPNUT