Awesome!
I'll certainly keep these suggestions in mind if I decide to make the switch.

In the meantime: Zoom-zoom, I know your Dominators didn't fit you, but could you comment on the sole stiffness? (My feet are pretty narrow overall--B, but barely--and with a narrower heel, so Sidis should fit me reasonably well.) I'm not quite ready to give up on SPDs just yet, since I'm not getting those angry spots on my feet. They just ache.