Whatever class is more fun too you. DBs and NLs are both really expensive to fund and both get really good when they are at near cap damage. The advantage NLs get is you can transfer their gear to the much better Nightwalkers after they get revamped.
I suggest watching a few Revamped NW vids to help you make the decision between DB and NL. --- It is fortunate to be favored with praise and popularity. It is dire luck to be dependent on the feelings of your fellow man.- The Havamal