M3 is the better car for everyday use as it's marginally better on fuel and has less to go wrong with it. M3 Evo is faster but not hugely, when we raced them side by side the Evo was about 2 car lengths in front at about 110mph, over that and the Evo came into it's own. The Evo has more toys and IMO is the best E36, but more costly to own. Price plays the biggest part, getting a decent Evo that's as it should be will be 9k+ unless your v lucky, M3s are nearer 7k. Mileage wise there's one kicking around with 168k and still going strong. As an everday car I'd deffo pick the M3, although I used the Evo more often than not