Warped Rotors?

[twxsby]

I just re-built the front end, had the rotors turned, new calipers, pads, bearings, and races. Flushed the system with new DOT 3 fluid. I have a bad vibration when (only when) brakeing. No matter what speed. If going slow, slow vibration, and going faster, faster vibration. Should I replace the rotors? Do I need to replace the races again, or can I re-use the new ones I just put in? Any comments on the slotted aftermarket rotors? ($170/pair) I've read that turning the rotors reduces their ability to absorb heat, making them warp easier. Maybe Advance Auto did a crappy job turning them? Maybe they didn't mike them? I dunno. It's frustrating when you put all this work into it, only to have to start over for something stupid like that. Should've just bought new rotors to begin with.