Pink Panther,
i ll speak in a different way, first i ll state what options i have that could skip on them...in order to have some alternatives for the same money
1) Sunroof-
a)It costs a lot
b)I rarely use it
c)When open or tilted is makes some noise
d)It has no usage as you cannot see the sky

2)Sports seats
Although thehy are great they have some disadvantages
a) They eliminate the access to the rear seats, even if you just want to put some things at the back and not put someone to seat
b)They wear more quickly as all sport seats because the anatomy of the seat is designed to fit and hold your body tighter
c)They make some noise because as they are bigger they tend to touch the plastics of the car all around them, i.e the center console.
Althought keep in mind that they look muscular and they cost nothing if they are just sport seats and not adaptive
here they cost just 1200 Euro
Now Bose is very nice and qualifies to my criteria 98 %
I dont know how the stock system sound and comprimise it is BUT i guess that with 9 speakers it cant be crap
ONE OPTION i m glad i took, and due to this, i had to wait 4 more months,to get my car, (because there was a same specced car without the sport chrono, ready to be delivered)is the sport chrono..
It does many things its relatively a bargain and you CANNOT retrofit it, plus i love the chrono on the dash ....oooops!!
NOW what i mean is i could easily sacrifise all these extras excluding sports crhono, to get the S for the same money , and not have sunrrof,metalic color,sports seats etc...
Bit i didnt ,if i opted my car now i would go for a stripped S without theses(and if there wasnt any tax problem).
NOw some options i would like are:
parktronic
sports steering on the base model
xenon lights on the base again
and many more
Its just depening on your personal preference...
I would put all of them if i could but here all factory extras affect the taxation of your car...
The most important that you have to keep in your mind is;
DONT WASTE YOUR MONEY AND TIME OPTING FOR RETROFITTING EXTRAS(again my opinion)
Because:
1)you can add them later
2)You can spent your money now on things they cannot be added later
3)you can take you time add add whatever you like in the future adding a differentiation note to your ride as time passes, so that you dont get bored with the appearance of your car over time...
For example:
1)Short shift
2)PSE
3)aluminium,carbon,leather,wood interior
4)Navi
5)cd changer
6)telephone module
7)passive handset
and many others can be retrofitted..
i hope i helped, until now that is my opinion..