I had my Integra Type-R before the Cup, did some track days in it and ran it for 26 000 trouble free miles. It is a no nonsense road racer, fearsomely noisy and hard, but with pinsharp handling, excellent, ABS equipped brakes and a stonking engine-gearbox combo.
In a straight line, my ITR was almost identical performance wise to my Cup, I clocked 6.7 to 60 in the ITR and 6.6 in the Cup.
Around the track, both are superb. If you buy one, you wont regret it.
However, I investigated the tuning route extensively, and if you want to tune your motors, I advise against an Integra. Exhaust an intake will cost you a fortune, and only give you another 5 hp if you are lucky. Someone I know spent about 4 grand on tuning, including racing cams, exhaust, intake, manifold etc, and came out with another 11 bhp. That sucks. So it is best left alone.
Good luck!