We love Moo.com for business cards. While expensive per card, they let you order in small batches, as few as 50 cards, which lets you experiment with job titles and designs to see what works best. We get the Classic card stock, which is a nice heavy paper that is glossy and feels expensive to the touch. Ours come with the always hip rounded corners. Folks are constantly commenting on how nice they are.
About the only thing I wish was that it was easier to write notes on the cards, they tend to “shed” the ink.
Look closely at the cards below and you can see we each came up with the job title that most describes what we do (or aspire to!)