I'm in the market for a new helmet because my old one is grungy and doesn't fit my head well. I've never owned a full-face before, but I'm considering it for a variety of reasons, some personal, some practical. For one, I sometimes commute on some nasty rocky singletrack, and on some dark roads that tend to accumulate debris. I figure over a lifetime of commuting, I'm due at least one nasty facial.

I'm pretty sure I want to do this, particularly since most regular cycling helmets really hurt my head anyway, and a full-face should be more stable in a crash, so I won't have to tighten the straps as much - right? I'm figuring it might actually be more comfortable than a usual helmet for me.

Question to people who own them - just how much hotter will they make your head vs. a regular helmet? Presumably, I'd be wearing it year round.

For reference, the two I'm looking at are the Giro Remedy and the Bell Drop. Any opinions on those helmets?

PS - please, folks, no helmet debate.