Ride quality is hardly may main concern either; I drive a Z4, after all. But there is a point where you have to say enough is enough.
My issue with mods for street cars is that I'm not an engineer who is spending a billion dollars to develop and test a car. I can't take a test drive on a new exhaust or a new suspension. I can maybe listen to a video on YouTube, but there are so many variables there. I say just buy a car you like out of the box.