- Upgrade the radio to the RCD510 minimum because the standard one looks out of place, especially at night.
- Go for the Monza shadows because 17's just don't look big enough on the Mk6 due to the deeper flat face on the arch compared to the Mk5 (if that makes sense).
- Xenons, if you can afford them - halogen headlights are sooo 20th century.
- Metallic paint, because white and red will go out of fashion again in about 18 months.
- Lots of girls buy second hand GTI's, so if you want them to be interested come re-sale time, fit parking sensors or the camera. Actually, forget the camera - they have enough trouble knowing where to look when going backwards as it is... (sorry, couldn't resist)
I've not heard Dynaudio so can't comment, but I intend to have it on mine, together with the Lux pack (can't live without the puddle lights), winter pack (which should really be cheaper if you have xenons fitted but isn't) a sunroof, parking camera, ACC and auto hold (had it on my passat and it came in handy). Unless I buy the R, in which case I'll just have the car and 19's, RCD510 and paint, as it's going to be too expensive.