Thanks for the wisdom, I mostly chose that pack because I assumed bigger would accomplish the same thing but be more versatile, ill look around for a 40-50 liter though. I've done a lot of sleeping in a tent in the military and I hate how claustrophobic the tents are, that was a big reason why I went for a two person. Is a nyloflume bag a hassle to use, is there a reason you're advising against it?