I have 2 discs with two aces on them; an E Star Wraith and a regular Star Wraith. The E Star found the wall because it was getting a little damaged and I have another that is almost exactly the same weight and wear. Yet it is not officially retired by any means, just currently I am not throwing Wraiths. The regular Star is still in great condition and if I was not getting better results from my Valkyrie/ Firebird combination, it would probably still be in the bag.
I currently have only one ace disc in my bag, a Star TeeBird. That one is too valuable and perfectly broken in to take out. Hell, if it has one ace on it already, it is just a matter of time before it gets another. That is pretty much my philosophy, I bought them to fly, not to collect. I only have one disc I have permanently retired, an X XS, my first ever "great disc." I have two more on semi-retirement, a Dragon and a Raven, both because of sentimental reasons (my daughter had written on them when she first learned how to write).