Are you a sit down type of rider? or out the saddle rider on twisty trails?
Maybe best wait until the Surly Krampus is available to test ride and what its drive chain/tyre clearance will be like – prototypes clearance looked a bit too tight for UK mud.
If you do not plan to ride soft sand on the coast then it may be a better bike for you and it will be more lively on twisty trails.
Fatbikes are fun, but… if you ride near sticky clay and clag the tyres remember you will have like 3 times the weight in mud than a normal bike to cycle/push 😀
Or… get the Surly rabbit hole rims and 3″ Knard tyres and have a 2nd wheelset for your fatty 😉 🙂