I'm going nuts trying to find a good business card printer. I want high quality, price isn't really an issue, but my local printshop just quoted me $300 for a one color doublesided card and that seems a little insane.
I've been pretty happy with http://www.uprinting.com/ in the past. They are quite affordable, they offer a free sample pack (so you can get an idea of the quality) and I appreciate that they have someone do a quick prepress check before the printing to catch any potential issues.
I havent used quarterpage.com - a buddy of mine has -- they designed his card for free --- I might try them, when i run out of cards - Im looking for a vinyl banner printer