I'll throw a thought in here. With the reference to sports and cars in the OP's reference, I've tried and don't care for ball heads if something is moving. Right now I have a Manfrotto 055 Prob (not home right now, think that's the model) along with a 3 way head (bought used this last year). It allows panning shots with more stability than I could get when I tried out a borrowed ball head. I like to do airshows and landscape shooting and this has worked better for me stability wise when there's motion involved. I've considered a gimbal head but it's not in the budget at this time but is definitely on my radar for some time in the future.