I HEARD THAT THE GTI-R IS THE BETTER ENGINE. But how does the bb stack up? i want the know the differences in power stock of course. and which is easier to get parts for its no use have a fast car if you can't replace parts. which motor is easier to maintain and get parts for? im really think parts options is more important.

Check out the Bluebird vs GTiR thread. It is just about exactly the same question as yours and it is only the 4th thread down from yours in this same exact forum.