If the guy is looking to get rid of one, its fairly easy to narrow the selection down to two bikes.
The Monster and the XR are very specialized bikes at each end of the spectrum, they stay. The Vstrom and the KLR both fill the same niche. The KLR being more dirt oriented with the Vstrom being more street/touring ready. If the guy wants a more dirt oriented touring dual sport then all he really needs to do is put a sump guard and some knobbies on the Vstrom and he will have a trail ready tourer, it wont be good for much other than established single track, but the KLR isn't the greatest dirt bike either.
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