You've got a good start. The powders you have are not explosive, but they are flammable as packaged. Sorta like the can of gasoline you have for yard tools, they need to be in a place where fire and sparks can't get to them. A cabinet built for flammable substances would be nice, but my powders live in a wooden cabinet on the wall. I have approximately 20 or more cans at one time.
The Varget is an excellent powder for '06 and 308, though others may be just as good. I've had success with Varget in 223 through 45-70. It and the 4198 are both excellent in the larger calibers.
I've never used the AA9 or H414. I use Unique, Bullseye, and H110 for my pistol rounds.
Ben