I have had RS6 replicas on my Q5 and A6, and haven't had any issues. I've been running them for almost three years now: 2.5 with the Q5, and about 6 months on the A6. The black paint is holding up well, but the machined areas are starting to show some wear. However, I run my cars through car washes, the wheels have been through two harsh winters, the roads suck with tons of potholes, and there is constant construction in my daily drive so my car is getting pinged my rocks daily. I think any wheel with any finish would show wear. I even slightly curbed one wheel, and nothing happened. Now I am running 19s so they are somewhat protected with larger tires. I drove through Orlando recently, and the roads were impeccable. If the roads in Ft. Lauderdale are good I wouldn't hesitate, especially if it's a wheel you want. For me I wanted 19" black/machined RS6 wheels, which you can't find anywhere.
Bookmarks