Out of the 2 you are currently listed on, HitBit and Poloniex, which one would you recommend? Haven't joined either of those, but might enlist in one... just to be able to trade in XDN.
I would say Poloniex, unless you want to stay anonymous. Hitbtc was said to be possibly faking their volume, but Poloniex now requires your name and country to withdraw. Apart from that privacy thing, Poloniex seems quite trustworthy.