have owned both and E30 is better drivers car, but for a day to day driver, performance included the E36 is miles ahead inspite of what the so called experts all say.
I reckon the E30 M3 is one of the most over hyped cars, buy one and make up your own mind, I did and I sold it soon after.... my e36 would kick its arse in every respect apart from feedback from the steering but I can live with that.