Haha... Mandy, I'm in the same situation as you(funny that as we have the similar mods!)
I don't believe I'd want to remove the APR pump on the basis Revo have changed enough of their map to not require it, i.e requesting 130bar... And anyway if it's requesting 130bar and your pumps giving it, aslong as you're getting the AFR right then surely this will make more power than a map that requests less fuel... on the basis of more fuel/air=more power...
Like you i'm stage 2, and require an intercooler to go stage 2+, but still wonder if I just max out Stage 2 and start on suspension mods, or go the whole hog and jump to stage 2+ as I would have all the supporting gear to run reliably I believe.
There's hopefully going to be an Airtec GB coming up if you wanted a cheaper(still quality) intercooler option, and then you can decide stay at stage 2 and max out the settings or push for stage 2+...
But you know if I go stage 2+ then to keep our cars the same you will need to too!