Blue-
Dude, you haven't even ridden an FJR yet! It's a rocket! Get the bike first...then make up your mind about power. My '03 can wheelie in 3rd gear with just using the throttle! Top speed recorded on a dyno was 156mph! It's already very fast. Granted, the '03 have been documented to be quicker than others (and it's lighter, too).
A turbo sport touring bike is kinda against the concept of long distance reliability-doubt it would ever happen from the factory. If you recall, the older seca and honda turbo bikes had insurance rates that were through the roof, too. And they did not last that long.
They normally are short lived appliances, spinning at nearly 100,000 rpms on the high end! My Mr2 Turbo with a TD06 turbine runs at appx 90,000rpms at 17 pounds of boost. Fast as hell..almost as fast an the FJR..but will need to be rebuilt every 40-50K miles of street driven use. Track use would kill it within a season of racing.
Besides, where would you put a turbo or SC? Everything is sooo tight I doubt it would fit.
Keep i mind that turbo engines as designed from the factory have quite a few modifications to the base engine. Fueling, ignition timing, stronger main bolts, larger distance between cylynders, larger cooling jackets, larger radiator, lower compression, forged pistons/rods/cranks, ceramics, and a different exhaust system. You may even need water injection or an intercooler to keep detonation at bay. Obviously you are risking a VERY short lived engine if you add something like a turbo and it wsa not designed for it.
My vote is to get a Hayabusa if you want something crazy fast (as opposed to silly fast). And they do have turbo kits for that bike.
What bike did you have before?