It was funny that when I went to change the wheels on my car for the winter on the 335i, I realized just how low it sits even in comparison to my A4 with H&R Race Springs. I just went out to measure the two cars and the 335i Coupe with my winter wheels/tires gives me about 5.5" of clearance to the jack blocks. For comparison, my A4 has 5" of clearance to the lowest point of my side skirts. That means that with sport springs you are under 5" of clearance more or less on a 335i coupe.
The biggest difference is the aftermarket bumper and exhaust on the Audi since it gives me more or less 4" of clearance. I do not think I'd want to go that low again simply because I had too think too much when I drove the car.
In the end I guess I love that look w/ race springs but the sports are probably good enough for my tastes these days. It all comes down to what you can live with
