Why would you bother if it's for track use only?
Whenever I see these threads I always wonder why 7-style cars aren't considered more often. If people want a racing car experience then they are far and away the best method of getting it.
Certainly worth considering, especially as we are talking no road use.

Problem with 7 type cars is that if the weather is bad you'll have a totallly miserable day.

definately like the look of that porsche ! Isn't the 944 or 928 supposed to be totally amazing ?