I would really like to hear your opinion and advice about the following options:
Logic7 Sound System - I love listening to music in the car but I don’t know how much better the sound will be after spending the extra $1200. Is this worth the investment or the standard sound would be satisfying?
Power rear sunshide - does it make sense if I want to tint the windows?
Heated front seats - is it true that E90 will have standard heated front seats but optional "3 stage heated front seats"? At www.bmwusa.com - "compare vehicles" you can see it's standard for E90 and optional for E46.
On-Board Navigation System w/iDrive - I've heard many negative opinions about it. I think it's better to go with a thirt-party product for less than half the price. Am I wrong?
Comfort access - looks like a very interesting feature but I wanted to do ED at the end of July and this option will be available from September

. Is it possible to have it installed at the dealership afterwards? Is it really possible for somebody to steal the car while I am gasing up?

Thank you all in advance!