I really wanted to the DMT's to work for me (really are a great shoe), but they were too narrow for me, so I ended up Shimano's which for my feet seem wide with lots of ventilation - I have the R151 versus R215 as I think that the three 3 straps feels better on the feet than the R215's ratchet system, plus you are paying about $70 more for a ratched bucket - as that is the only difference between the 151 and 215's.

I used to use cheaper Pearl Izumi's and did get hot feet after about 2 hours riding, now the Shimano's I do not get that - just lots of power with the carbon soles!!