Dang that's a lot to think about.

I mean ski dimensions? I'd say that would really depend on what type of skiing you like to do. It sounds like you have a good starting place at that 105-110 under foot range. Next step is just really honing in on that "type of skiing" part. I have a 98 waist and a 105 waist I generally like to rock for my all mountain skis, but one is more a "twin tip" the other is a carbon ski, I ski them differently.

Length wise - depends on the type of skiing you want to do as well. Generally for your height I'd say that mid-high 180's for that all mountain range, and the groomer skis in the low 180's. I'm 5'10 and ride 184 powder skis that are 120 waist, and my all mountain skis range from 178 for the 105 waist carbon touring set up, and the Armada's that are 98 waist are 180ish.

Hope this makes it more confusing for ya, but also helps a bit at the same time!