Re: 4-color KEM or Copaq like decks
 

the quality on the 4colordecks.com is not great. I would not recommend them for home games.

the only good 4 color deck I've used is made by www.avonmoreinc.com. they are bridge size paper cards designed for blind grandmas, but are OEM by Carta Mundi (Belgium) and should hold up well for poker too. a double deck set is $8 + $2.75 shipping.