I have no idea whether today's Audis have the same stuff as our '00/'01, but I too simply love the hard clear on ours. Fairly thick too. Chip-resistance is OK but hard paint often seems to chip more readily than softer paint does.
BUT...the hard clear won't save you from wash-induced marring. I get new Audis as service loaners (and see them in the showroom) and they always look terrible. The prep guys at my dealer aren't all *that* bad, but *one* wash and a brand new car looks like a horror-show IMO.
A friend of mine just bought an '07 (or is it an '08 :think: ) in black, and it's simply AWFUL. Totally marred up and that's after his dealer tried to prep it for sale.
So..unless you can wash marring-free, and also correct hard clear, I sure wouldn't buy a nonmetallic red/black one. If you can usually go a year or so without polishing and/or correct hard paint without any problems, then sure...but it's still gonna be a part-time job IMO. I'm pretty good at this stuff, and there's NO WAY I'd buy one in those colors. Yeah, I'm a wet blanket but how much time do you really want to spend on this stuff?