Go 12ga if you can, 14ga will be ample for most people.

Brand does not matter.

heck, I ran with the cheapest "lamp cord" from a local home improvement store for years. I know that Axiom sells some pretty sexy looking stuff, but I got mine all bulk from monoprice.com

Simple, basic, cheap, and it works. Whatever you do, don't believe the sales pitch to buy Monster Cable or the like. Proven to be completely not worth the price.

Farewell - June 4, 2020