I would suggest Dgex, the site looks terrible, but the operator is trustful and you will get your Nxt quicker than with Crypsy. 
http://dgex.com/index.htm?2254 (ref. link)
http://dgex.com/index.htm?2254 (ref. link)
Ugliest site on the net.
Yes! Graviton is nostalgic for the 1990s.
dgex has as well his own dgex's capital stock, which he,by the way, was selling for ''developing'' his service...and untill now -there isn't any developing yet
