With a size 12 foot, you should be fine on most boards. Also keep in mind you can usually go with smaller boots than your regular shoes. Try out some 11.5 or 11's and see how you like them. At 180 You're in the 157-159 range. I think a 161 might be a bit big unless you're riding a bunch of powder.
Avoid lift plates like Paris Hilton's cooch. Both are going to leave you with a painful burning sensation and won't help you in any way.
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