Son, YOU want to control air assets in a battlespace containing my brothers, and you can't even find a serviceable rucksack on the internet, nor find the recommendations for rucks here on this site? We are going to have a lot of friendly fire incidents and missed drops in your AO.
I've had a large ALICE ruck for more than 20 years, it survived ROTC advanced camp, four years in the infantry with the 101st, a handful of deployments and a whole bunch of jumps with 5th Group and JSOC. The only things I ever did to it was have cat eyes and a nametape sewn on it. Oh yeah and I added after-market kidney and shoulder pads that slid over the existing ones. If you're just looking for conditioning, an ALICE is a good one.
If you have a specific unit or school in mind, I suggest you find out what they're using and buy that.