Hacksaw,

I would think that SAR is mostly off pavement work. So, most any good hiker/hunter boot should suffice for 95% of your work. I would lean towards the hard Vibram-type sole. That is what works for my foot needs in an off-pavement environment. On pavement the Bates Lites were best for me. I do feel the pain!
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"Its not a matter of being ready as it is being prepared" -- B. E. J. Taylor