yeah thats the problem, most roads are very non low car friendly, especially in towns and city's highways are not to bad..
Now if you could adjust or alter that nice low nose at slow speeds or just lift the car up 3" through hydrolic or air shocks, you'd have the best of both worlds.
Porsche makes the spoiler on the back of there 911 rise up at higher speeds.. we could figure out a easy way to do it with the nose or lower part of the air dam.. Linear actuators are pretty cheap and can provide hundreds of pounds of force.. enough to move the nose up or down a few inches..
As for crashes etc.. my nose on my project car will be all insulation foam.. its how ill sculpt the new nose for it.. it will also provide some great crash protection with 3 feet of foam in front of the car