It would have been smarter to make it an Infiniti. The Fast and Furious crowd are the only people interested in it being a Nissan (nobody else knows/cares about the history of the GT-R) and 99% of these people can't even afford an Integra. You'll only see GT-R in the "tuner" community as shop cars and magazine whores.
Meanwhile, Infiniti is stuck with the unenviable problem of selling more cheap cars than expensive ones. They have essentially become the "G35 Company" and have styled pretty much everything for the future based on the success of their cheapest model. An expensive "halo model" would help downsell more G35s I think. Nissan already has a 30k sports car, the addition of the GT-R isn't going to change much of their image. It would make a big difference for Infiniti though which hasn't been able to break through in the "expensive luxury car" arena well at all.