Photoshop :: Intuos 3 Pen Or Airbrush In PSCS

I do a lot of montage work in PSCS and have recently been using my Wacom tablet and boy do I love it, but have a question for those of you who use tablets.

When I'm doing a montage I use very soft brushes to merge the edges. With my Intuos pen, even though I use a large soft brush setting (same as the one I use with a mouse) I get very pen like lines, so I always end up switching to the mouse. Do I need to do something with either the pen settings or the way I use it, or should I be getting an "airbrush" for this kind of work.