It's been my experience through 100's of brake service jobs that one piece of iron (brake rotors) is as good as the next. There may be exceptions to this, but IMO buying OEM is absolutely not necessary. For brake pads, find someone near you that sells Performance Friction. They are used on HD trucks and for performance applications as well. I have them on my 2500HD and love them. The hotter they get, the better they bite!
http://www.pfcbrakes.com/Parts-Finder.aspx
I would also add that pulling the studs through with a lug nut will stretch the threads. They should be driven through from the back side or "staked" in. When the stud is seated, your hammer will bounce back.
Pulling the studs through is akin to over-torqueing.