James:
See how much I care!
(1) If you get a sunroof, then you will be undecided whether to keep it shut with the blind pulled, shut with the blind not pulled, open, tilted or any other combination you will try and obtain. You will then start a new thread and drive us nuts.
(2) If you get ACC, then you can choose between normal, sport and comfort. I think this will be a more tolerable option for you as there are only 3 things to choose from.
(3) With a sunroof, you will get some wind noise at motorway speeds, so you will have to pull the blind. However, as you will only be driving mainly on country roads, you don't need ACC which is wonderful on motorways and on rough urban tarmac. As you also seem to be a sedate country driver, ACC 'sport' mode will be wasted on you. A sunroof would be more suitable for your purposes.
(4) Most important. Don't get a 5 door as you will be undecided how many times and which doors you might need to open and close. The 3 door will simplify your dilemma.
So get a 3 door, don't get ACC, get a sunroof (mainly useless but I like them) and be happy!
