The problem with that thinking is your 70 dollar bag will most likely fall apart in a year then your going to have to spend another 70 to either get the same bag or you make choose to buy a Revolution and then youll spend 115. Either way you just spent more then it would cost you to buy a Revolution in the first place.
I have a new theory. I think Revolution is the best and so do alot of other people but from this thread im going to say the 2nd best bag is the Gateway Tour or the Gateway Backpack but i still reccomend you get the Revolution