Like the others said, it depends on what you make. Back when I was 22, (oh, last year), I got around $8k for the same purpose. I started with Discover, moved on to FirstUSA Visa, and recently went to MBNA Mastercard.
Honestly, I just look for the 0% APR with no annual fees and no balance transfer fees. I consider them short-term, no interest loans anyway, I'm not planning on staying with any of them long-term (except maybe MBNA).
Good luck!
-geoff