The ultimate deck for anyone would be one that is borrowed
i second that.
anyway since you're only starting out, the normal bikes are the right ones for you, they're cheap, nice and in case you lose your interest in card magic, you wouldn't regret spending a couple for expensive decks that you wouldn't use in the long run.
and if you manage to keep the interest and become an adept, familiarize yourself with card finishes. This would help you determine what kind of deck is good for you and your hands. Generally, there are (i think) three common card finishes. (you could see what is the finish type of a deck by looking at the side of the deck box, they don't put those card finish labels for nothing you know.)
The first is air-cushion, this is the same finish used in the normal bikes, guardians, etc. Second, cambric finish, this one is commonly used on casino "themed" decks such as bee playing cards. I think, the cambric finish is a bit thicker than the air cushion. The third, Linoid, this one is used in tally-ho decks and the split spades (the one endorsed/created? not sure, by david blaine). these decks are thinner and feels a bit larger than the common bikes or it's just me.
other things are also needed to be considered, like what type of magic are performing (stage, street, or plainly just for your friends and stuff).
i hope this helped you.