I'm a midwestern hunter with a Kuiu Icon Pro. I really like the pack to haul gear and equipment, but haven't hauled quarters with it yet. I tried the Metcalf in a store with sandbags and it didn't feel all that comfortable in comparison to me. Just my 2 cents worth.
A friend of mine suggested against a magnetospeed, but only because he thought there was a better, more cost effective brand. I'll have to ask which brand.