Replying to How fat do you really need to go?

I had salomon 2012s as my only ski for park and everything else, and their edges are done. In the interest of carveability, I bought a pair of bonafides (98mm waist) for an everyday charger. If I were to get a pow ski, how fat do you really need to go for a non-touring, sidecountry/in bounds pow day type situation?

For example, would it be worth it to go with the squad 7 (120mm) over the Super 7 (112mm). The turning radius increases by 10m, losing a bit of everyday versatility, but is 112 underfoot too close to my 98 bonafides to be worth it? Does one really need to push it into the 120 range?