Not sure if this helps, but I went with the Slumber Jack Rail Hauler 2500 and I m very pleased with it. I shopped around a lot for a good deal. I only paid $119 for it.
I day hunt almost exclusively and the solid frame lets me haul a full deer out in one trip. Its a very compact frame not like your standard frame pack at all. It also came with a nice 2500 cu in roll top bag that I can stow my stuff in and it stays out of the way. Its anodized aluminum is quite light and sturdy.
Plenty of attachment point as well. for PALS/Molle
Cheers
