well, i've always been told you should receive them as a gift, all my decks have been gifts, though i wasn't a fan of my first deck. with my dragon tarot, i saw it at the store and fell in love with it, then a while later i received it as a Yule gift from my mom.
with all magical tools, it should draw you to it. you should look at the decks and one should be pulling your eye more than the others... or you could look at the price tag lol.
pick the one you feel close with.