In reply to legali:
Unless you are racing, I wouldn't let weight be too much of a concern. I picked Hardsides as they were purported to ski well. I have no idea how much they weigh.
I am around 100kg, so saving 300g isn't really a factor.
Hardsides have a metal laminate layer, giving a stiff ski. For me, the Backup was not enough ski. It may have been for others, though. My touring buddies all ski skis that ski well, even on multi-day tours, rather than superlite ones.