/vr/ - Retro Games

Sup /vr/, by some stroke of mad luck I have come into possession of these beauties. I've never had a Saturn growing up but always wanted one. I have a bunch of questions that I hope you guys don't mind answering. I've done a some research but I'm still a little lost.

So, first thing's first: I have one US Saturn and one JPN Saturn. They came with one controller and one a/v cable total. I used an apple tv power cord to test them. I'm not sure of the voltage but will it be okay to use long term?

Do I need the 3D controller or arcade stick or is the default controller enough?

What's the deal with the internal memory? I know there's a watch battery in the back, but how can I tell if it needs to be changed?

Action Replay. Do I need one? It also has the ram expansion and the memory. Will this allow me to play backups as well? Do I even need both Saturns if I have an AR?

What are some good starter games that kinda showcase what the Saturn is about? (cheap stuff like the equivalent of Sonic 2 or the 6-Pak on the Genesis maybe) There's a new sealed combo of Virtua Cop/VF 2/Daytona USA for $20.