the DVX is a more resonable size for skiing, it has a bigger selection of lenses (they are cheaper too, but the XL2 lenses arent fixed, so they are better in a sense)
the DVX also has superior color settings of any standard definition miniDV camera. Also, the XL2 can mount 35mm lenses directly to camera, with a cheap lens adapter. The DVX requires a $1200 (approx.) 35mm DOF adapter to do this. For skiing, you shouldnt worry about it.