Never heard of XTC decks... care to explain more on it? Getting regular bikes are fine. TH9's are good too.
XTC: Extreme Training Cards
I've seen or heard of two different kinds of "training" decks. The XTC deck is a standard deck of Bicycle cards (mine are red), but they lack the smooth finish. There are very rough and thus do not slide apart when handled. The other kind (I've only read about these) are more like metal plates. Five if I remember correct. They are meant to simulate a thick packet with substantial weight so as to build up manual dexterity.
The XTC deck makes sense to me for learning complex packet control (not for magic). Once you've got the feel of the move sequence down, switching over to a standard deck of cards (whatever you'll be performing with) should be fairly simple. This is what I've been using to try and learn the pass. Anybody else have experience with these decks?