If anyone's looking into Denon's I would recommend the DNS-1000, personally I think it's one of the better CDJ's in the $250-500 price range. I've been pretty happy with mine, I got it about six months ago. Has flanger, delay, hi/mid/lo-pass fx, can play MP3 CD's, etc. A very solid player overall.
The only thing I don't like is the jog wheel is difficult to get used to and isn't as smooth to scroll as the wheel on the pioneers, so if you want to scratch with a CDJ I wouldn't recommend this model.