the ITR is expensive cuase, yes its a ITR. its a limited production car, that, at the time, had some high end stuff done to it, that even today Honda/Acura cars dont have.

It has an LSD, not even the 02-04 rsx had an LSD
The intake manifold is the manifold on which Skunk2 and AEBS were copied
Cams very pretty aggresive for OEM
Valves are still THE BEST valves to run, flow the best , back cut, etc.
The valve throat is .010 wider than any other B series head=flows more
Molycoated pistons
dual valvsprings
Good OEM header/exhaust combo
5 lug and beefy suspension compared to GSR/RS/LS
better sway bars
better clutch
Better handling car stock vs stock.

now, if you are talking about a better car STOCK for STOCK 01 GSR vs 01 ITR, i would take an ITR ANYDAY over a GSR.

you guys are comparing 94-95 integras vs a much newer and better car. 01 GSRs still fetch 10-12K. 01 ITRs fetch 15-20k depending on mileage. An ITR is a limited production car, therefor its resale value is more.

My Girlfriends car is an ITR. She has the normal I/RMF Header/Exhaust/Clutch Tein Suspension/Mugen Strut bars. i drive it from time to time. its a great car, its pretty quick, handles great and has been very reliable. A gsr with similar mods would get WORKED by her car.

my .02

EDIT: USDM ITR compression is only 10.6:1. we have turboed 3 ITRs, no issues when properly tuned. JDM Compression is 11.0:1

USDM K20A2 is 11.5:1 for reference