Oracal, Avery, 3M (Do not mention it to Homer), Avery, MacTac......
Oracal seem to be the choice for most. Very good quality for the price. See if you can find a house brand of the specific supplier you will be using for a regular stickers. No need to go overboard for those.
Try contacting your local Fellers rep and have a chat with him/her, they will explain quite a lot to you.
Do not forget the laminator
Most of the stickers should be laminated. You can use Big Squeegee for smaller stuff, but a laminator is something you will need down the road.
Good luck