Looks good! I would want side pockets (for water bottle, tent, fishing rod), but that's me, not you!

The trick with these lightweight materials is to handle the pack carefully, not plop it down any old place and especially not drag it. Also, if you regularly smash off-trail through slide alder, devil's club, and similar Cascades vegetation, the material may snag and rip. My pack from Six Moon Designs (discontinued in 2006, so no relation to their current offerings) has held up well in the 12 years I've had it (although I haven't been able to use it much the past 3 years). It's made of silnylon with a dyneema bottom. (It did require a little re-stitching after its first year, but SMD did that for free). It has flat aluminum stays very similar to yours, and, for me, is very supportive and comfortable.

I hope you have many good years with your new pack!
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May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey