I am in exactly the same boat and have been looking at those same packs. I am a day hunter and like to travel light, so my current pack is a Browning Billy 1700 waist back with shoulder straps. It is awesome for deer and scouting but since I’m getting serious about getting my first elk, I want something I can haul meat out with.
Like the OP I really wasn’t wanting to spend as much on a pack, so I’m really doing my due diligence and research. Really interested in the MR Popup38, Sawtooth and the Pintler. Budget is super tight, especially since I need to buy new boots this year too, so going to be keeping my eyes open for sales or good used ones. I am 6’3 and 250 with long torso, so I definitely need an XL size, which poses a problem for finding used.
I saw GoHunt has the older Pintler for a lower price, but I’m not sure if it wouldn’t be best to wait for a cheaper used pack or pony up for the new 2020 MR frame style. The popup is intriguing because of its smaller size but I worry about load capability with that one. The Sawtooth is great because of the pockets and organization (I love compartments and pockets), and the 270° zipper is really cool.