Hey Anto, come on, I mainly check this forums for your posts! They're amusing, in a positive way.
More to the point, no clue how much faster I ride on the Cyclosportiff compared to the Raven Tour, if at all, but it
feels a great deal faster. So I see where you're coming from. These days Thorns are quite utilitarian, they used to build fun bikes like XTC or your Audax 853 (though clearly it's not fun enough for some
) but now entirely focus on utility above all else. This makes me wonder, if it's not partly cause by the fact that regardless of all arguments on the strength and durability of steel frames etc., if someone wants a super light bike then they'll always choose the carbon stuff over Thorn anyway. Which is maybe what you really should do...? If you want to have fun on a super light bike, then that's that. Thorn themselves would likely tell you to look elsewhere for that.
But don't take offence when others tell you swapping forks won't make much difference, you're really unlikely to notice 500g less up front, and climbing as far as I know is more to do with short wheelbase than forks (which is why my Cyclosportiff is so nippy on uphills - any takers before Christmas by the way?
).
My advice - wait for the spring, sell the Audax, get a bike that will make you happy.