I know you've placed the 650r as last on the list but have a look at the versys. The suspension is better as the travel is a little longer and progressive rate springs are used and its adjustable. As a another example of what the versys can do check this and part B out. I am stunned myself at the performance of this bike...
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http://www.youtube.com/watch?v=m7ivn5PeQz8