do not choose a pack on weight, ESPECIALLY ones for big trips. The aether and gregory balmoro usually fit men the best. not familiar with volt. Go to store and load up pack with weight and walk around. Usually one will clearly fit better. Buy that one.

I have the rei flash which i got on sale for $99. Never use it after trying, and promptly buying the aether.

you sure 70 and 60 enough volume for that length of trip?