[Marmoot]

I approve the above post. The rear TTX is a huge difference from the inferior Showa you get on the 848 (which in my situation considering my 75kg weight and bumpy New Zealand track was bordering on actually being unsafe).
Front forks would benefit from revalve at the very least, and correct springs. Even these would transform the bike dramatically.
Slipper clutch is definitely a huge value.

If budget is an issue, my priorities would be ttx rear, front revalve+springs, slipper clutch, then front fork cartridges.
That is assuming you have at least aftermarket mufflers (akrapovic highly recommended). If you haven't, put that in before front fork cartridges.

 

[Marmoot]

In my case it was a question of how much indeed. Revalving + changing springs on the oem showa would run quite close to new TTX (which would come correctly valved+sprung as part of the build process) that it was an obvious choice.

Gotta remember here that badly sprung+valved ohlins is probably just as bad.