My question is this. I am going to Japan, to ski at Rusutsu and Niseko in February, and I am trying to figure out if it's worth bringing my Brahmas (173cm 125-88-110), or just renting while I am out there.
I would love to hear some opinions.
When I was in Japan you certainly would have needed the 108's or more. With intermediate pitch in that deep snow you can easily sink in and grind to a halt if you don't have enough surface area underfoot. I used my 110mm underfoot powder skis 10 out of 11 days in Japan in 2011. I hope that ratio is similar this coming January.
12 seasons ago 90mm WAS a fat ski. The 90mm Volant Chubb was my powder ski from 1997-2008. It makes sense in that era you also went long to get more surface area in Japan.
In the modern era when even a lot of 100mm+ skis are decent on the groomers, it makes little sense IMHO to be much narrower than that in Japan IMHO.