It is a little difficult to tell exactly what causes hot foot, but I think it is width of shoe across the ball of my foot... Most of the shoes I've tried are stiff. (Diadora, specialized, shimano)

I'll keep trying different mtb shoes until I find a pair wide enough.

I haven't tried sidis due to price. They approach a custom shoe in $$... And also finding the shoes locally is a little difficult. If they fit, though, I'd pay twice the price.

sarah