If you are just getting into smoking you might want to start with a Tupperware--ador, or even two.
For a cooler or a Tupperware or a desktop humidor beads are just fine, an Oasis would be overkill and not needed at all for the items listed.
A digital hygrometer works for any and all three yet might no be needed for Tupperware just starting out.
It really depends on how you want to start, starting small and exploring cigars and trying to find what your preferences are, then Tupperware or a small desktop humi with a digital hygrometer would hit the spot, everyone always say get bigger than you think you need, but you can always save that for step two.
Are you going to buy singles (or 2s or 3s) to start or do you know what you like and you'll be buying boxes, that makes a difference.
btw you can buy Shilala beads here
http://www.cigarbeads.com/