Looking into these for my 16 year old son, he is 5'8" and 115 lbs, light but very athletic and skis 30 days a year. Is this to much ski or would he rock the mountain with it?

I would have him look at Mantra instead. Smaller size too. Depends on what he skis, but at 30 days per year at his age, I imagine he is probably loving it and ambitious. That is how I was until college when 60-100 days a year was more likely. These will probably last him through freshman year of college, get SOLID boots, a binding with a good DIN range, and probably look at Mantra if you are looking at Volkl only. Check out some other places like Teton Gravity Research Forums and backcountry outlet.

I am also from Montana and have been riding a gotama for a few years now. These are probably the most fun skis I have ever stepped into. After that being said, I am 20 years old 5'11" and come in at 180lbs and I still ride on a 178cm gotama. They did rocker it up a tad this year but I'm going to have to say it probably still needs to be muscled around a bit. Its a lot of ski to control. I'm afraid it may overpower someone of smaller stature.

These are some pretty stiff boards. Being that light, even a 178 will probably be a lot for him to handle. I'm 175lbs and picked up 183s last year. I have to be on point when I ride these, if I start slacking off at all they let me know it. Definitely not a forgiving ski, which is why I wouldn't recommend them for a lightweight. At least for last years model. I know they rockered the tip and tail this year, but I'm pretty sure it's just as stiff.