[fortunesknave]

I have a set of KEMs, Copags, and now 2 sets of Del Negros.

I much prefer the Del Negros. They are thicker, and though plastic, have a papery feel compared to KEMs and Copags. Kem's are slippery, and Copags feel unsubstantial.

I bought my first set of Del Negros because I found a coupon for a company that sells them on chiptalk.net. You should check out that sight to look for deals. Also, people are often selling/trading their used cards just because they don't use them.