I think there are a TON of great packs on the market these days…but another SG suggestion here. A lot depends on if you’re solo or hunting with a buddy to split gear. But, instead if the 5900 I would suggest either the 6900 or 7900 on the X-curve. You aren’t sacrificing much on weight with either one, but you get a lot more flexibility. These still cinch down to nothing for day hunts, but what if you want to do a 10 day hunt in a few years…or what if you’re doing a solo 5-7 day hunt in bitter cold? I’m on the bigger is better team. These packs aren’t cheap, get one that’ll do it all. I did the opposite…started with the 5900, then ended up getting a 7900 as well. Love my 5900, but if I had it all to do over again I would have just started with the 69 or 7900 and been happy.
For context, I used my 5900 on a 6 day hunt in Alaska with temps down to the teens at night earlier this month. But, I was with a buddy and we split gear so I didn’t have a shelter or wood stove in my bag, and we didn’t need to bring water on the island…it was pretty damn full after food.