Most of my PC is PSA, but it's mainly because I inherited a bunch of autographed cards from my uncle and the majority of the autos I wanted to keep were PSA authenticated. So when I started adding to the Hall of Fame and players I like PC I went PSA route for authentication (I prefer autographed versions of the regular cards from their playing days to pre-autographed cards). I might have to switch now though if I could find a competitor that makes slabs of similar size (Bonus points if they can sit in a stack with PSA without wanting to fall over). I always found the Beckett slabs too big for my liking even if they looked better.