I would definitely go with the Instantpot brand. I have the 6qt one and love it.
Any accessories that are must-have? I'm looking at a steaming insert for veggies.
Shredder claws to shred pork and beef after cooking....These are awesome...
https://www.amazon.com/gp/product/B00KP14E9M/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1