I'd rather have the new american version of the skyline, I'm not into the RHD thing and you'll be able to get a GTR for 70k ish based on the rumors I'm hearing.
the one downside of the new GTR I've been hearing is that the ecu is almost impossible to hack so you can tune it. although from what I hear about the test drives there is no need to modify the car anymore. I wouldn't touch a thing if I could afford one.