OK....new racer question.....I am looking to purchase some wheels for my 80 RX7. I was looking at the diamond racing wheels, since they offer a resonably priced 4x110. They offer both 13" and 14" sizes. Which is better?

Lets say for arguments sake that for all around use, 13" is better. Ok...then what tire size is best?

I know wheel/tire size can change based on which track you are runing and which gear you are running. I am just trying to find a good baseline. Something that might work a little everywhere?

Thanks.