I'd say keep the BFG's... Toyo's for SOME unknown reason command a premium price. I'd rather have the extra change and Tires I KNOW will last a long time... The KM2's have proven them selves here in the NW to me, the Toyo's just haven't cut it. FWIW both sets of tires are on identicaly built XJ cherokee's and the traction in the NW soup has been NOTICABLE. Granted NEITHER of them have the dig of the OLD BFG KM's but then the new KM2's are ALOT quieter and last longer so...PLus they do well in snow. Neither one is as good as the Venerable BFG AT-KO's in SNow. The KM2's SIPED are the better of the two choices.
Toyo's run quiet, but if you're running a true Mud Tire is this really a concern??? Neather of the are Boggers, but the BFG's just perform better in my conditions... You may find the Toyo's work better where you are, but again, IMO they don't perform well enough to cost that much. PLus I KNOW the carcas of the BFG's to be alot more solid while still air-ing down well. The Toyo's were stiff as could be (both the same 33X21.50 size too, again both mounted on Jeep XJ's of near identical build) and air-ing down didn't seem to make that much difference. The BFG's were MUCH different. Air-d down they were even grippier and worked on all sorts of terrain from Rocks to Wet, nasty roots.
What really suprised me was that my 33x10.50 AT's out perfomrmed the Toyo's in nearly every category BUT the deep mud (I still got through just had to gas it more... The Toyo's cleaned out better, but ONLY marginaly) Then wehn it came time to crawl I got through ALOT easier then the Jeep on teh Toyo's... Granted my 4Runner weigh's more and has a better W/b for climbing, but the Jeep on the KM2's was really shining.
That's my experience and opinon... The NW is a very uh..."different" place compared to most other wheeling grounds. Espescialy this time of year. I will say though we've got it all, from Rocks to Roots to Mud to Snow. THe BFG KM2's are what I'm going to after my AT's wear out.
Cheers
Dave