Cory,

A Miata is a convertible and you may encounter some issues with running an open top car without a roll-bar. BMW CCA track events for example prohibit convertibles without a rollbar and that you AND your instructor pass a broom stick test. Hate to see you limit your choices in track events with a 'vert, or just plan to add some safety equipment into your budget.

I'd say you're hooked!

Is it time you look at E30/6s?