I've done a few parts of the TAT out west and most of the CDR. I don't think you want a true windshield. A flyscreen works well enough for me, plus a sheepskin buttpad is a good thing. You'll need a soft luggage system and can't avoid a bigger tank, though. I think you'll want about 200 miles range to do most of the stuff out west.
I vote the Suzuki.
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