I want to get Dynafit FT Carbon 10 skis for my AT setup (w/Dynafit Comforts) but am unsure about the ski length. I am 5' 7, 140 lb, expert skier. Trying to decide between 169cm (116/86/109) and 178cm (118/88/110). My leaning is towards 169 but I wonder if this lenghth may be too short for me, especially when I am on multi-day hut-to-hut tour with a heavier backpack? Also, If you have any comments on these skis - I'd appreciate your sharing them. Thanks.