Maybe I missed this, but when it comes to loudness, is a bigger bar better or worse?
One comment about Kifaru - I think they're great when you finally get them adjusted, but man it took me years to figure out what worked best for me when it came to heavy loads, and calls to Aron and Customer service didn't help. I love the packs, but I definitely need to wear them higher on my hips than most recommend. If I had to wager, it's because of where the lumbar pad sits in the small of my back, i need the pack up slightly higher to get it to sit right.
@Zach Herold - you might try bumping the belt up higher so the bottom third of the belt as opposed to the middle sits over the point of the hips, tighten it down there.
Next pack I'd love to try is the Stone Glacier, but too many gear purchases already this year.