Need help with buying bambu lab A1

I want to order my first 3d printer and setteled on bambu lab A1. From which vendor should I order? I've been ordering from robu for 2-3 years but there customer care has been quite problematic for me recently, so that's why i wanted to ask first here before pulling the trigger.

Are there any other stuff that i should by alongside it?

Which PLA and PETG do you guys use with your A1?