Does cost matter? Many of the higher end packs will cost you from $350 to $550 or more. If you are truly looking to step up from that Badlands pack into a combination day pack - occasional 30# meat hauler....you can do that nicely for less money.
One question to answer is simply how much frame and bag do you want for a day pack? If it's going to be hauling meat loads multiple times each year you might want a pack with more frame and length. On the other hand, if you're most interested in a day-hunting pack which has the ability to handle meat loads up to 50+ pounds on a very occasional basis, you've got choices in the $150 - $250 range. Those packs won't be as comfortable when loaded with meat, but that may not be a big deal on one-time pack-outs. An example is the Eberlestock X2 which is a rather deluxe day pack that carries great while hunting. It has plenty of options for internal and external gear carry. It will handle 50# without question, but a good bit of that will be transferred to shoulders simply because the X2 is not designed with a stiff frame, load lifters and a strong hip belt.
Some of the answer is just a matter of what a guy likes on his back. I don't like to carry more pack than I need...size or price. I've got some great packs which were rather expensive and I use them on hunts where they apply. They stay home when I need a day pack though. Lots of other good choices out there.
