For me nothing can touch the Grand AM's with it's mixed class of the Riley and stang. Love the lap out behind the safety car and getting the " green, green, green! " it just feels special to me, has a wicked atmosphere that although all the series i race i get that buzz sat on the line, the Grand AM's just have that something extra for me. No other sim gives me that buzz! Ok from time to time in a club/league race you get it with other sims but it's very rare for me to get like i do with iRacing, it feels real intense like it really means something. Maybe i'm just a crazy man that's get's too immersed in it all I love the longer races, i also love the V8's. Off topic slightly, i was so looking forward to rFactor 2 but you know what? I really couldn't give 2 hoots about that right now. All other sims just feel so stale and aged now.