I've got a APR stage 2+ gti pirelli - same engine as in the new R (not the same base as the new gti)
This engine on the awd platform is going to be great.

Tune wise, they are all off-the-shelf and not custom.
Apr from quattro motors, GIAC from marks workshop.
You can also go for a bluefin from superchips (handheld map switcher).
WA doesn't have a revo dealer, nearest one is SA... That's a tune you can easily alter timing/ fuel/boost on with their handeld controller.

If you're curious about how some mods wake up the car, I'd be happy to show you.