Splitter w/ ski gear questions

Hello all! I’m a splitter, My wife skis and has expressed interest in getting a backcountry setup. Her resort gear belongs in a museum and neither of us know anything about backcountry ski gear.
I assume you wanna buy the best boots possible. Where shall we start, and does anyone have anything for sale? I’m sure most answers are preference based(anything new is good?), but I’m interested to hear what everybody likes! Thanks!
 
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