When I was looking to buy an MX5 I set a budget and short-listed maybe twenty or so, test drove about half of them of various Mks and engine sizes, and at first I was not bothered as to which engine, all the cars handled brilliantly and were a joy to drive.
However I was very much put off by the rust I could see on all the NAs and NBs, some NBs rust was so bad I didn’t dare to risk a test drive, and oil in the exhausts on high mileage NCs, and walked away from them. After a few months of looking I decided to double the budget and only look at low mileage NCs. Eventually I bought the best condition car with the lowest mileage, which happened to be a 2litre Niseko, not the newest nor the cheapest.
Since then I’ve become accustomed to the superb torque and flexibility of the engine, and the only negative aspect when overtaking on the motorway is the way it can suddenly zip up to a ton with just an inadvertent twitch on the throttle - I sometimes have visions of my spotless licence suddenly taking wing.
I’ve since driven both versions of the ND; both brilliant, but the 1.5 needed too much stirring of the gears, and the 2 was too uncomfortable (jarred back pain after only fifteen minutes), and so I will be keeping this NC.
Being a 2litre it has 17" wheels, PRHT, 5 spd box, LSD, climate control, heated leather seats drivers with height adjust, adjustable steering wheel, DSC, fogs, detangoed as per original spec, but non-Bose stereo.
As the others have said, look at lots of cars, and test drive a few to get a better feel for how they might suit you.