Replying to Scott Jib TW, length & binding advice

I'm planning on buying this years/next years Scott Jib TW ski, had the one from last year and it is awesome to ride, but with 158cm it is just too short, also it has a broken edge.

Now here my questions:

I'm 165cm, is the 168 too long for me? Since I do mainly jibs I don't really need the additional length for stability on jumps

from what I've experienced the 2014 are a lot stiffer than the 2013 version, is this possible?

also, the 168 appeared a LOT heavier to me than the 158

last question:

would the FKS 14 be a good binding on it? had it this year, but I feel like a heavy ski + heavy binding don't make a good combination, also scott+FKS seems weird anyways


would be glad for some advice!