The Super Ten is also shaft drive. The F800 and Tiger are Chain.
There are valid arguements for waiting on the WC GS. It may have its bugs the first year or two. The Super Ten is pretty solid machine and alot of people LOVE them. I would love to get some seat time on a ST.
I know I already love the current GSA, they are just outta my price range right now.
If you really like your bike as much as you say, you would have turned down the sale OR never listed it to begin with.
Buy one of everything, then sell them off as you pic what you like. The one you ride the most is the ONE to keep...that or buy a bunch and ride them all, that is my motto, but not my budget.
it is easier to ask for forgiveness than permission