FM, it really depends on your needs. If you like the added feature of pockets of the XTL more than the simplicity of the Standard, you have your decision. Depending on which pack you have, you don't always have to take the lid. You can fold up the top and close it up or put something on top of the pack like a tent or pad then cinch it down. Or you could just be sick and own all three like I do, then choose which one you need on a particular trip.