On the Azodin, you're not going to have any issues worth speaking of. On an Axe, you may find yourself at the fill station more frequently than you'd like, so you will have to weigh that against the cost of a larger tank, or a higher pressure carbon tank.
I can tell you that I used 48/3000s for many years before upgrading to a carbon 68/4500. The difference, in terms of how many shots between fills, is huge, but it will set you back a few bucks. For reference, here is what I'm using: