I 'm a huge fan of Live for Speed andl really like the 1960s of Rfactor2, couldn't miss Assetto Corsa with all the hype about its physics (+decent gfx which Rf2 has skimped on)
First impression are very good, certainly on a different level to pCars, but some little nuances of LFS physics seem to be missing for now (not to say that physics overall are inferior- probably not), for one suspensions seem to be overdampened - just try emergency stop with Abrath for example, there is no recoil when the car stops fully.
Nice vid of eye candy and physics in AC: