Mike, Trust me when i say "don't get coilovers". There hell uncomfortable, and really only for race cars, get a decent set of Koni's and you'll have nice handling with a good ride. I'm sure Ken can hook you up with something.
I knew you'd be Ken's no.1 customer, don't forget to call him with all your questions;)
Dyno is in, just waiting for the extractor fans and there fully operational:D
RB25's I wouldn't take past 8000 without doing a solid lifter conversion and forged internals, plus the crank isn't supposed to be as strong, so swapping to an RB26 crank will mean it could handle GTR revs.