As someone who owns 2 of the Festool Autoclean vacs and one of the new Bosch, I would only consider the Festool vacuums if you plan on stacking systainers on top or expanding the CT26 and up with accessories like boom arm, work centre ...
If you just want a very good vac for wood dust I'd advise you to look at the new Bosch vacuums. They have considerably better suction.
And, if you're also going to be using the vacuum for cement or drywall dust, there's only one choice really, and that's the Starmix iPulse vacuums.
So to sum it up:
* If you only need it for wood dust -> Festool if you want to accessorise, because while good suction, they don't have the strongest suction.
The new Bosch vacs perform considerably better.
* If you need it for cement and drywall dust as well -> Starmix iPulse, as it has a superior filter cleaning system compared to all the others.
Best of luck with your choice and purchase.