At one time factory rockers were on fuel cars.

Stage V stuff is very nice, Indy's stuff isn't bad either and they have adjustable stands now.

The T+D stuff is expensive, but it allows you to do so much more on getting the geometry correct, and keeping it there after a valve job, or changing valve length and so on. Not to mention the pushrod clearance issues. The T+D will allow you sacrifice one parameter to gain in another. The time saved in geometry correction makes them worth the money to me, and they're just plain better than the factory style stuff in my opinion.