I have them in my 3L......Was a little apprehensive re cleaning as my wifes A3 2L Turbo has a very similar style and they are awkward to clean. However, the new design seems to have a little more space between the double spokes than her car does and they are not too bad to do at all. As with all alloys the secret is not to let them get bad before you clean them and as Rich says, plenty of wax now and then. As for the ride, I'm sure a smaller wheel and bigger tyres would be a little smoother but they are far from bad, especially after my last car which was an RS6 on which the ride really was hard!
MartynC