I know some owners who have had the chrome window trim and grills wrapped black for a couple of hundred pounds. Not sure I would. Black editions have 19s as standard and the features of a comfort and sound pack too. I think the 19s make them very hard.
So you want anS3 so you'll actually get an engine cover?
Mine has 19s and they're OK, would be better for ride comfort with a different tyre brand - I got bridgestones.
I like the Aluminium trim on mine, but then again my S3 is black, so it provides a bit of contrast- black edition with black paint might look a bit "drug dealer"/"pimp".
There were about 45 pre built S3s on Audis new car search yesterday, most have comfort and sound, 19" Trapezoid alloys, red calipers and some also have HBA. Lots of colours to choose from, currently £2500 deposit contribution and not too hard to negotiate another £1800 off the dealers margin.