As Kev says its down to personal choice. We picked our options for the following reasons which might help you decide. I am using we, as her who must be obeyed had the last say.
Sunroof: To allow more light into the cabin. Also on hot sunny days helps to keep the car slightly cooler when parked up.
Cloth: As we like the tartan. We would have went for leather if there was another choice apart from black. Be aware leather can be roasty roasty in summer and coldy coldy in winter.
Lux pack: For the folding mirrors.
Winter pack: In Scotland it's a must have. More for the heated washers and heated seats.
RCD510 with dynaudio. Liked the touchscreen and required it for the rear view camera. It has been reported in here that the standard RCD510 has good sound quality but the dynaudio is excellent.
Sat Nav. Didn't bother, would rarely use it. Can read a map.
Phone prep: Didn't bother again would rarely use it. Nobody phones me anyway.
Park Assist: Cool, look no hands.
Parking sensors and rear view camera: Sensors for the obvious reasons, camera for spotting the neighbours cat, (I'll get it sooner than later...sh!t in my garden will you)
Alloys: Personal choice again, I don't like the Monza shadows so went for standard.
DSG: Again for personal reasons. But I would recommend test driving both DSG and manual and make your own mind up.
Paint: Tornado Red. Classic colour, used to have a red Audi and we really liked the car in that colour. 2nd choice was a tie between white and graphite blue. I would say look at the cars in the flesh before picking a colour.
Flat Tyre Thingy. £35 pound why not.
Hope this helps, If you let me know what area you are in I can give you an idea of what dealers have as demonstrators.
edit:- 5 doors for practicallity have 2 sons both 6ft+, The 3 door does look good though.
