I've been using the Oregon Scientific ATC5K all season and have been pretty happy with it.
It has a wider field of view than the 2K or 3K, is a bit lighter and having experimented with different mounting points, I have found that mounting it FIRMLY to the side of my helmet with the small rubber pad that comes with it, takes out virtually all of the wobble. It also has better resolution than the previous models.
I was fairly diligent and was able to buy mine on ebay for $65.00, new and in the box. I also stocked up on SD cards so I can shoot as much as I like throughout the day. My key to keeping it working in cold temps is to take it off my helmet for the lift ride up and putting it in a pocket with a ZIPPO handwarmer (I also keep spare batteries there too as this cam eats up a lot of power). The helmet mounting pad is easy to use with one hand and I can take the cam off and stuff it in a pocket entering the lift-line.
The only drawback as compared to the higher priced POV.1 is that video can't be immediately reviewed (which makes having spare SD cards cool; shoot different runs/friends/views on different cards for later review). I take the cam down to the truck and check it out on my laptop at lunch or just wait until I get home to reivew the footage. No big deal, really; especially for less than a hundred bucks.
Oh yeah, one other thing. The lens gets packed pretty easily when I get face shots in deep snow, but I can't imagine any cam, at any price, performing too much better in those conditions.