kem or copag?

Kem cards are great cards and are the cards by which other cards are judged. However, Copag are just as good, last just as long, and are half the price. The only problem I have experienced, if you want to call it a problem, is that when you set the stack of cards down, the top card tends to slide off the deck. Kem does not seem to have this problem. It doesn't really effect play that much. Also, they have less glare making it easier to see the flopped cards. Money is not an issue for me, I'd gladly pay the money for Kem cards, however, since I've started using Copags, I see no reason to change.