1. Heated Seats? I do not think this will substantially protect you from the chilly morning drives. I have driven in some really cold mornings and I do not think the option would have defrosted me more then a cup of coffee. Or tea for the brit in you.
2. Leather storage pocket? Yes! There is absolutely no storage and my phone flies all over the cockpit. Papers do not fare well either. My rally routes always manage to fly away.
3. Starcom? Nah, I have it installed an have not used it once. The ear buds are uncomfortable and the cords are all over the place. Save the money
4. Immobiliser? Maybe, I do not have it an have left the care a couple of times when on drives with the driving clubs. People do congregate around it. This might give you so security.