I would say in the 2000-3500ci range. More if you are hunting in the winter and need the room. I would second others here who have mentioned to make a firm decision on whether you want/need a loadshelf or not when picking the pack. In the “use what you have category” I started out with. Gregory...
I have the Beartooth and have spent about 30+ days with it, but no Sawtooth experience. One item I would add is that the Beartooth is pretty bulky (straps, main bag etc) even when slimmed down, but it definitely feels smaller with the lid off. So if you plan on running light for the day, try...