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.
I had some money there,but it was so many delays with withdraw,many other upsetting things...
that after all I got all my money from there, step by step-this is VERY HARD JOB TO TAKE YOUR MONEY BACK FROM dgex.com
Now, I do not want to hear anything about this bad smelling site...
Cheers
You are retarded, DGEX is atm the best exchange for NXT out there.
The design is crap but will be changed very soon. I bought over 100k NXT already, everything went fine at any time.