I've looked pretty hard at these. The $100+ price tag is keeping me away right now. As you pointed out, they are very light for a technically rated axe. The slightly curved shape should work for basic ice climbing. The pick is better than most other axes, but is not ice specific.
You don't necessarily need this axe for Lib Ridge. Any axe with a decent pick would do all right. The only axes I wouldn't recommend are the Black Diamond Raven and Raven Pro. Their picks really suck in ice. I was on Glacier Peak late last season, the glacier was pretty much bare, and I couldn't get my Raven to plant at all. It just bounced off.
My 2 cents...