PIAA wheels are very nice quality. Just because someone ran over a pothole and cracked a wheel dosn't mean that its bad quality. The wheel is also not the only problem when it cracks. Driver error, tire size, tire pressure, and etc are also in the mix if a wheel cracks. PIAA only make quality products and have been making racing products forever. And that guy that cracked his wheel; PIAA replaced the wheel for him free of charge. And they arn't that heavy compared to a SPotmax 962 or 006.
I like them! but i like a lot of mesh wheels, I though about getting a set of these when i had my Grand prix GTP. They shouldnt be that heavy, they use them in racing...here http://www.piaa.com/Wheels/gallery.html
thats weird because they even have an xB in the gallery image ...so maybe you should get them!