OZ-
I have heard rumblings of getting that VET into S13-15's. It's just as possible as a Rb26dett swap, but would require some time. I think your approach is good, tuning the KA. Strong motor, I've heard people getting 300-400 hp easily. You'd need injectors, turbo, intercooler, manifolds, turbo piping and etc... But if you could pull it off it would be a great track bitch and fairly docile cruising thru Davis. You wouldn't go so fast that you couldn't avoid the bicycles.
I appreciate your reasoning, but more power is never a bad thing in such a well-balanced chassis and with such nice suspension. How are those Azenis 615's as a tire? The AO48's on my dad's evo are going bald and if he does another trackday, he'll need another set.