Danners are decent - I've had some good use out of a pair of Mt Hood Lights for the last few years - I will point out that any of the Vibram(ish) lugged soles will wear faster on a motorcycle than you might like... but the Danner Stitch-down soles are re-soleable. They have various amounts of insulation in the different models.
Note: I've found that Danners come a bit narrow compared to some boots ( a boon for me as I have narrow feet.