Just picked up a pair of halos for $367. I am 5'10" 185lbs and got 182s. I made a thread asking about the size on the elf shoe armada skis, and i think everyone told me to go 182. Just got them in the mail today and they look great. I got them to hold me off because my ar6's are taking quite a beating until i can pick up some 2011/2012 Alpha 1s.
I think as you suspect that the halos will be better for buttering, and might wash out on bigger jumps is you dont stomp it, but i just flexed them for the first time today and thought they were pretty stiff, (not noodles)
So I'd probably go 182, and probably pick up the halos, because like 350 for a pair of new armadas is a steal.
hope this helped