A couple weeks ago I got to drive a XXX-S, Paraletic's car to be exact, and I've got to admit it was a very nice car to drive. Beside's having a bit of understeer compared to what I'm used I could drive it as well as my TC5.
I can definitely understand why you guys are still using this car, this car must've dominated when it was new considering how well they are still seem being quite competitive against the modern TC's.