why do you think you need a din above 14?
while the bigger you are you need more DIN, the bigger your feet the less DIN you need
So unless you have absurdly small feet for your height and weight, likely you don't really need DIN 14.
If you were limiting your choices just based on that, you can now expand and look at other things.
can get you some idea of what din you really need (but get it done properly at a shop if you aren't sure)
http://www.powder7.com/ has a ton of used demo skis that you can take a look at.
That being said, I don't think the skis you picked out is a terrible price, but it's not a deal either.
The bindings are the stock demo binding, so you don't need to redrill anything.
I'm not going to be a binding snob and say you need to go spend $300 for uber ski bindings and system demo bindings are just crap. They're fine.
just as a point of reference, powder7 is selling the line115 for 449, add on shipping and you're in the same ballpark.
but maybe figure out what skis you want first, then look for best price.
or at least put out some proposals then ask which would people pick if they were in your shoes.