I had two rifles built on Defiance actions last year and one on a bighorn. They are all very enjoyable. I like the defiance actions a little better, my gunsmith loves the bighorn actions. The bighorn is a very accurate 6x47' shoots in the 2s but that could any number of things.
Jon Beanland built those rifles and he may be a good source for an opinion. Nice guy too, if wait until the work day is done and call him around 5 you might get more of his time. One man shop
Nakneker, I have never owned a Defiance action. Do you think that the Bighorn would do better or same in the mud or dust as a Defiance, Borden, Surgeon etc? I have this, possibly wrong, idea that the floating bolt head on the Bighorn allows the bolt tolerances to be slightly slacker.
Thanks for the info fellas. I'm leaning towards the deviant, but I may hold off on the build a month and see how the TL3 actions run.