I suppose you should consider which factors are most important for you and the intended use.

Autocross, road course and street driving have different requirements, then throw aesthetics into the mix, if that is much of a concern. Since you probably have tires now, I would run a few courses and see where you think the car needs the rpms to go, are you lugging the engine often? or are you taching it out often but there isn't quite enough time to upshift before the next turn? Adjusting tire height can help tune to the application.

A taller tire will tend to hold straightline traction better due to being able to absorb more torque within the sidewall. On the other side, it will generate a higher slip angle during cornering. As with most things, it's all somewhat of a compromise on what your car needs the grip the most.

Aesthetically, I run 27" tall front tires and 28.5" rear tires with 17" and 18" wheels on my e-body. I like having tall tires and am not the biggest fan of rubber band tire looks. However, they are quite a bit heavier than their shorter friends. A 26.2" 295-series tire is 30lbs and a 28.5" 295-series tire is 33.5lbs, 7lbs heavier per axle in rotating weight...which is far worse than static weight. For my intended use [spirited street], that doesn't matter much. In the same breath I also run a close ratio 6-speed, it's hard to not have the right gear for the situation with that many to choose from.