Big feet, rear panniers and short chainstays don't mix well.

It is almost impossible to give advice w/o knowing your budget but the 520 is a winner and probably nothing better at that price point plus it has long chainstays. It is set for long distance, loaded touring. I would only have the wheel tensions checked and have some miles on them before embarking on a journey. Of course, hand built wheels can add a margin of reliability but factory wheels can also be good but they would have to prove themselves to me before taking a real jaunt.