I'll be the odd man out and recommend a BPL Absaroka. Can usually be found used for $100 here on the swap. I find it extremely comfortable and able to pack heavier weights when extra water is necessary. It is 42L capacity and 35oz IIRC. This is my go to summer pack when volumes are lower but I can fit 4 days of food easily.
Alternately, my winter pack is an Arc Blast, 52L in size (cavernous for my gear) and about 18oz average weight. Can also be found here used for $200 or less and also super comfortable and weight capable.