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These binders all have reinforced heels (one of the first failure points on traditional bindings). The Marker is the only option from above that doesn't have an upward (vertical) toe release so you don't pop out on a backseat landing. It definitely favors retention over release. Both Rossi and Salomon make bindings like that but only feature it on their highest end models (Freeski2 150/180, FKS 180, STH 16).
i picked up a pair of dynastar troubles from evogear when they had their holiday sales for like $100 and my friend had to borrow my chrons for a weekend and loved them (he has chronics to with griffons and said he liked the way mine skied better). I have only skied on them like 6 or 7 times this year but i would look into them because you'd save like $120