Just curious. The 13/14 Mantra was a ski i waited for at demo day but became impatient and demoed the Salomon Q-98 instead. I have a BMX88 and want to add something better on hardpack/ice. The BMX88 carves a nice turn on hardback when i pressure the tails, however it tends to chatter with toe pressure. Could be the tune, the ski (dual radius sidecut), me or a combination of. Whichever, after two seasons i'm ready for something different. I prefer not to get a all out frontside carver and would like to keep the BMX's smooth thru chopped up snow quality and light swing weight forgivingness in bumps. Not sure if i'll go up in waist, probably down. More thinking about the FX84 and Blizzard Latingo but could just as well forget the whole idea and stick with what i have for another year.
Agree with SJ, don't think going wider is the right answer for you!