Thinking about a first BMW...between E30 325i/is, E28 535i/is, or (less likely but maybe) E24 633/635CSi. I like a bigger car in general but would like to partake in the occasional track day in addition to daily driving. Is there a one car solution here? E30 is probably best for track; is the E28 too much for track time? What about the E24? Which is a tank that I can pile miles on? What would you do? I currently have an Audi. Thanks....