I've had KEM's, Copags, and Modianos.
Other than the artwork and colors, I think Copags are just as good as KEM cards. They also feel more substantial than KEM's.
Have you ever used a plastic card before, and if so, do you like the flimsy feeling compared to a paper deck?
If you'd like an even more substantial feeling card, that feels more like a paper deck, I'd recommend modianos (check caragails.com). Here's a review:
http://www.homepokertour.com/reviews_modiano_bj.php
steve
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