993 does some light track duty. I'm a little scared of tracking the 1M because of it's rarity, cost and most of all how upset I'd be if something was to happen.
My 993 has done 5 to 10 track days a year for the past 7 years and its a tank. fluid changes, Tires and Brake pads. No problems what so ever. Find a good one they are keepers.