You bought the lovely Green BC 140 from Aberdeen didn't you?, I remember as i was looking for an S1 at the time and almost went to see it
From what I have read I think you already know that you want the MR2, in my experience it delivers 90% of the thrills of the S1 but its usable 100% of the time vs the S1.
With a few choice mods you will not be disappointed, truly my old 2 is the only car i still miss owning to this day, it never failed to impress and make me smile like a loon when pushing on through the twisties.
Let me know if you are heading up to Knockhill soon, I have 3 trackdays booked before June is out up there (SIDC one would be good to meet up at) and I will happily chat to you about Roadsters.
Indeed, I'm trying to convince the co-owner of my current track car that a Roadster would be an awesome proposition for our next one, so even if you do want to do Trackdays the MR2 will more than hold its own.
My opinion, best of all words, looks, handling, running costs and day to day fun it simply cant be beat as a two seater
Hope that helps and feel free to pm me about a blether