I've been wearing a pair of Shimano SH-RA80 road shoes, but have been having problems with my toes going numb even on short rides. I used to use my Pearl Izumi Vagabond mtb shoes before I got them. My thought was to replace the shimano's with a pair of the Pearl Izumi Vagabond II. I was wondering if others used the same brand/model of shoes for road mtb, and if the fit is usually comparable.

Also, I'm using Speedplay X5 pedals, with the cleats as far forward as they'll go. Am I right, that its probably the shoes, and not the pedals? thanks!