It sounds like an Elise Cup 250 is the perfect car for you. As Martin says the air con is worth having - you will be very glad of it as you drive home after a track day in the summer - they can get very hot inside!
If it were me i would spec the big brakes as using it on track but not bother with bluetooth or carbon (waste of money imo).
Colour is massively important for maximum enjoyment of the car i think plus you don't want to turn up at a meet and see someone else with one in a better colour! I have seen pics of new Lotuses in a colour called 'air force grey' or something similar which looks great, as does Daytona blue.
I would look at a brand new car or at least no more than a year old because the current front clam is a lot better looking.
Lotus have done a 50/50 finance package on new cars that i heard was good but I don't know if they still do - why don't you give Connor at Central Lotus a call? - he's a nice guy, tell him MLOC sent you 😁
I don't know if you would prefer an Exige 350 but I know of at least one guy who had one but swapped it for a 250 Cup because the Cup is better on twisty roads because it is smaller, lighter and more wieldy. Personally I prefer the Elise too but that's just me.
I think you'll find the Cup 250 really does work on both road and track straight out of the box, and probably better than any other car full stop. Some can do one thing or the other very well, but not both, except maybe a GT3 which is hideously expensive to buy and maintain.
Have fun looking and welcome to MLOC.
If you do get one do join us for a Sunday morning run and meet in the Peak District next spring!