Avoid at ALL costs argentic-numeric. The owner of the sites (a German fellow named F....) doesn't have in stock what is offered on his sites. So you first send him a check THEN he'll order stuff from suppliers, and you'll get your your products (or not...).
French photo forums are full of rants/warnings made by people who ordered from him and who have never received the goods.
Mx2 is ok but argentic-numeric isn't... :-(