I read your URL. Sorry to hear you had so much trouble. I have been dealing with Tire Rack for many, many years without incident. I have professionally raced and I am quite familiar with many types of wheels for many types of applications. Road and track. I examined these wheels visually (can't x-ray them for structural problems) and found them to be built quite well.
That's not to say you didn't have an inferior pair. In fact I had 4 very expensive BBS wheels for my M3. Two of them were bad. It happens. Best to quote you. "When it goes good the process works, but when it doesn't it becomes painfully expensive and time consuming to correct. Good luck with whatever you decide." I agree.