Mmmmm i really hope im not disappointed, as i do love my music!
Get yourself down to a VW showroom and sit in any Golf, the standard 4x20w system is found across all trims of the Golf. Play around with it and see what you think.
IMO, the front-stage sound from the Dynaudio tweeters is awesome for a factory system, so much clarity. They beat any of the powerful BOSE or HK system I've had in other cars. The Subwoofer can be heard but not felt (which again is really nice). The Dynaudio EQ is really expansive & flexible so you can adjust to cater for your taste in music, perfectly, wither that be electronic, vocal, or any type of genre where sound sensitive is needed. It's also the sort of system that allows you to turn it up loud without distortion.
If you're the type of person who drives around with just the radio on in the background, it probably isn't worth it, but if you like your music and spend time in the car, then IMO it's a no brainer for the relatively small outlay of money. It was on my 'must have' list.
I see you're in Surrey, I'm in South London / Surrey, so if you want to meet-up so you can have a listen to mine to see what you think about the Dynaudio, let me know.