Cryptsy working pretty well with trading DGB. They might be #1 over CEX.IO as they continue to have withdrawal issues.
YC
I keep seeing people say cryptsy sucks and stuff, but there's not that many large exchanges that reliable so far (I haven't found any big issues yet there). Before mintpal blowed up it was about even with cryptsy anyway so I guess all the trading was just redirected there.
I've been with Cryptsy quite a while and never had a single bit of trouble with them. Your mileage may vary but, you could do a lot worse...