I've also found that KEM's quality has gone way down my double pack warped really badly and they were not cheap!!!! My preference is Copag and Modiano now although I also like Fournier but was wondering which I should go for for my local tourney starting up. I've ordered Modiano jumbo index to go with my already played in Copags.
I'm loving the look of the Desjgn cards but unfortunately there doesn't seem to be a UK supplier and shipping from the USA is just rediculous. I'll just need to stick to my Modianos and Copags.