I really wish some of you guys would give ARCA Sim Racing a try. The physics are better than IRacing. They have been slow to get new content out, but they're about to release Trucks and Nationwide, as well as Legend cars (I've got the Legends beta) FREE. They're also working on Version 2, based on the new engine that RFactor 2 is using, so it's kind of on hold until ISI gets the bugs worked out on their end.
Most of the racing is league racing, so pick-up races are kind of hard to come by. The race lobby looks pretty empty most of the time because a lot of the leagues are using direst IP connections. The Dillon brothers race in a couple of leagues there, and sometime you'll see McReynolds and a few ARCA guys there. I raced against Almindinger, the Dillons, Joey Logano, and a few others there before.
Unfortunately the TSF guys aren't great at public relations and they're working on a small budget compared to IRacing, but they do have a great product. It's installed at Daytona USA and in Bass Pro Shops.
If any of you decide to try it, hop into the HsT Endurance League server. We'll be glad to help with set-ups, etc.
TS info at:
www.havocst.net