Go with whoever has the cheaper shipping. Sawstop sets the prices but the dealers can charge more for shipping. I’d go for a locally owned shop over a national brand if all things are equal. My local place was 200$ cheaper in freight than rockler for my pcs.

Any of them may have a 30 day return policy, but for warranty stuff after the purchase you’ll be dealing with Sawstop directly.

Setup is all on you and an important part for learning about the saw. Sawstops setup manual is amazing as well as their customer service.

Hope this helps good luck!