I have an ITR and a GTR. I'm selling the ITR soon. Its a DC5. They handle really well. After upgrading to Eibach progressive springs, they are much, much better. Stock springs travel too much. Much better fuel economy as you'd expect. They do seem faster than they are. Handling is just fantastic and will keep up with or do better than most sports cars. Lacks power in the straights tho. In the end I was CRAVING for more straight line balls.
ITR insurance is much cheaper than GTR and because its sold domestically, you have a wider range of insurance providers. BTW I might have a JDM spec HKS super dragger catback exhaust for the DC5 ITR for sale. Brand new, unused. This model is not the same as the one sold in Australia. It was specifically imported.
I got the GTR because its much more of a hobby car; you can do so much more. Now I just need to learn to drive an effectively RWD car with about 400kgs more weight after ten years in FWD cars.