KyleA18's have a vertical toe release as well. It's not really a question of needing the increase in din, as most people will not ski beyond a 14. The 18 toe will just be much more durable. If you don't have a history of breaking bindings, the 14's should be adequate and cheaper.
I'm 6'2" 180 lbs, love skiing steeps and hucking cliffs 40'+ regularly when theres snow, getting better at the park, doing 270 onto rails now, swap ups, switch ups, 450s out etc. I can do cork 7's and sometimes 9, rodeo 7's etc. although i didnt do much jumping last season. just focused on rails cause we didnt have shit for snow. I usually rip my bindings off the ski before the binding actually breaks, which is why i got the nordica a of s ti comps for that layer of titanium to hold my bindings on.