I've been training for a thru hike on lone peak 4's, but I do tire of the rocks in the thin trail runner shoes,

I notice many sobos in boots so I am now considering them.

I tried oboz sawtooth II and the Bridger. The Bridger were the leather ones, they were stiff. Store said that was normal and they loosen up? Any one experience this? How many miles to break in?

The sawtooth were comfortable. I am going to try them in the vent version to see if that is more comfortable.