I have trouble seeing what is so bleeding good about NR2003. I own it and I have participated in a fair amount of online races with it. Thing is, apart from it's net code it's really not that much to brag about. It looks awful on just about any graphics card I've used and physics wise it's not outstanding compared to the other old NASCAR sim, NASCAR Heat, which by the way had an equally good net code, almost LFS standard. And it had it three years before NR2003.
No, NR2003 is for the fan boys and I'm staying clear of any product based on that. Ad the fact that in my book iRacing is no better than that goo you find in your mouth when you have a hangover and the result is clear. This one is not worthy of my time and money.