Thank you all so much for your answers,
I'll set a budget of 40K and buy a used cobra with a hardtop or something like the "ERA 289 Slabside" (again, with the hardtop), depending on the final price I'll invest in a more .."docile" engine that gives me more mpg as I definitely want to ride it as a daily vehicle, a friend had a miata, really comfortable vehicles and fun to ride.
Thank you again for taking the time to answer to my really long post
EDIT: I meant
softop, not hardtop, got distracted with my dog