I think the leather seats are great, mine are heated which is nice in the winter. I wouldn't consider an alternate.
I really wanted A/C when I was configuring my dream car but ended up buying an amazing used one without it. the Windows do the job in bad weather and obviously a/c isn't needed with the top down. I would have it if I was custom building one but definitely don't suffer without it. I also have an accessory hard top which I think is really useful in the colder months.
I don't have much confidence in their resale value, I would plan for the worst case scenario and enjoy it as much as you can!
I'm in New York City if you wanted to see mine.
good luck!
David