cfax, we have pretty mild summers here in South Carolina, usually only gets up to 94 and 90% humidity...

I've got a Raptor, and it's just fine, even off of the bike. I just bought a Joe Rocket Meteor 5, which is insulated and vented, so curious to see how it'll stack up this summer without the liner and with the flaps open. The Meteor is water resistant though, which the Raptor isn't, so that might be one advantage. I think you'd be happy with it though, I am.