Out of those three, Colder Fusion impressed me the most. I remember first downloading from CS a couple years ago. It was one of the most enjoyable coaster sim experiences I've had.

Top Thrill Dragster. Only because the end of the first drop marks the end of the ride.

Ditto on Mean Streak. The bark is worse than the bite. I even rode it before the trims were added on the first drop. What a waste of lumber, and space. They need to raze it and replace it with a worthy world class woody.