Replying to Binding/ski length question

So, I've been on Salomon S810 TI's for a few years now and they were starting to get some noticable lateral wobble at the end of last season. After inspecting them they're pretty beat, so I'm looking for some new bindings. I'm about 5'10, 140 pounds, ski all groomers because Pennsylvania and mostly park, 40 ft. jumps max, rails/boxes. Been looking at 4frnt Deadbolt 13, Marker Griffon, Tyrolia AAAttack 13, etc, not sure if any of those would be my best choice or not. I'm open to other suggestions too, looking to not spend more than 200 hopefully.

Also, ski length. I've ridden 165's for a couple years, and it's time to get new skis. I was under the impression that 165's were normal length for my height (5'10), but after looking here it seems that they're short. What pros and cons come with longer vs. shorter skis? 165's haven't given me any problems, but I don't know what I'd be missing with longer skis. I don't ride super hard, no huge landings or anything. Any advice would be great, thanks.