Contributed by Bill Arning / Philadelphia is having a moment as a city where artists can still afford to live and work. In an essay for the journal October, conceptual sculptor Josh Kline argued exhaustively that anyone hoping to sustain a creative life should give up on paying New York rents and move to Philly. It was a provocative suggestion. Philadelphia is close enough to Tribeca to spend an evening at an opening there and still be home in time to walk the dog, and the city offers teaching jobs and a far lower cost of living. The online debate was revealing: many commentators preferred the romance of sharing an apartment in Ridgewood to easy access to the Liberty Bell, Marcel Duchamp, and cheesesteaks.