I agree with MountainTi but for a daypack I would add mystery ranch back in there. The old dragon slayer and bighorn are still my favourite daypacks. I’ve had both and been using the dragon slayer for the past 6 years. I went through multiple low end packs like eberlestock and badlands back in the day, transitioned to multiple Kifaru packs and then settled on the mystery ranch.
I prefer the tri zip design of the mystery ranch, the pockets and the spotting scope/tripod storage down the sides.
It’s not the best for hauling big weight with no functional load lifters but it’s hauled many a bear skin or boned out deer in one load. If I’m packing heavy I take my Kifaru but for a daypack it’s my pick of the litter.
IMO between the alpha packs they’re all great, bombproof, lifetime warranty, yada, yada but they have different features and only you can figure out what’s important to you. If money is a consideration find a used one. I bought that pack above for less then $200