OP, I really wouldn't worry too much about the 3rr anymore. I can't speak for everyone but I've seen a lot less red ring problems than last year.

My 360 gave me the 3rr problem almost a year ago exactly and I fixed it myself. It's actually a pretty easy fix (and permanent) if you have a clue what you're doing. It takes just over an hour. I've fixed about 12 360s from friends and friends of friends and no one has come back to complain. Also, I saw what Microsoft did to "fix" people's 360s that experienced the problem and I can assure you that it was not a permanent fix. They simply added more heat syncs and that was not the underlying cause of the 3rr. Also, I would agree with the above posts and say DO NOT MOVE THE 360 WHILE IN USE OR WHILE IT IS STILL HOT AFTER POWER DOWN! This exacerbates the true problem with the potentially affected 3rr xboxs.

If your 360 craps out on you, send me a PM and if I'm in a good mood, I'll help ya out!