I go with Dual Mode: Playing with the Stylus didn't seem comfortable when I first did it. (I know there is a way to fine tune the sensitivity, but the Dual Mode seems to allow me more accuracy than the Stylus, interestingly enough. :?)
I haven't gone back to the Stylus mode since day one, as far as I know.
Stylus, with just a little bit of practice I was able to aim just as well as I can on a computer FPS, although it helped that I played the First Hunt demo to death before hand
I've tried dual mode, maybe with practice it could be good, but I can't imagine it ever being as precise as stylus, so I've never used it for long (and never in multiplayer).