From someone who's done time in an agency: these are my favorite and most talented digital design shops: http://delicious.com/jm3/agencies http://delicious.com/

From someone who's done time in an agency: these are my favorite and most talented digital design shops: http://delicious.com/jm3/agencies http://delicious.com/jm3/agencies (sharing these to amswer your question and because it's inspiring to check out all the great work; most of these shops will be well out of the price range of any reasonably frugal startup.)