Don't forget about your mobility. With claws on your hands, how well will you be able to do things, like carry your con bag, push elevator buttons, dig out money for the dealers room, hold a drink...
I think two would look cool, but only for a photoshoot. Otherwise I think just one hand is more than enough, and easier for you, too. ^^
[font="Franklin Gothic Medium"]~Anime North 2014 Masquerade Co-Director [Masquerade AT animenorth.com]
~ Anime North 2014 Culture Track Organizer
In Toronto and like kimono? Check out the Toronto Kimono Club!