I'd use the Schlage. You could put a light bead of sealant around the edge of the escutcheon to keep water from getting behind it. Otherwise the only thing you can do is keep everything lubricated well. $111.00 for a Schlage F51 lock is crazy. The other one for $37.73 is an F51 chassis too. The only difference is the Orbit 613 vs. Georgian 622, (knob design and the base finish). The mechanical parts are the same.
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