One thing you're all over looking is the fact that ANY 4 stroke motor will burn lots of fuel at WOT. They are not designed for that speed. Where they really seperate themselves is at cruising speeds & below. You can run a 4 stoke at cruise all day long.
ETA - I would go with the SHO just for the simple fact that it is a 4 stroke and not a 2 stroke.
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