Careful with bucket style fermenters. They generally aren't pressure rated to close transfer to a keg at anything greater than 2-5 psi. Ask the manufacturers of these products what the pressure rating is before you buy. Most will likely shy away from the question. Better yet, if it's not stated in the product description, don't bother.
Pretty sure with Nano X you have to buy a separate pressure rated lid for it to work with pressure. Which brings up another good point.
Consider the additional accessories you want to make your new SS fermenter do what you what. A lot of these will come with varying options that you may find yourself not using at all after dropping a lot of cash.
There is a similar thread on here you might find useful. Search conical or stainless fermenter and you should find it. Don't remember what it was called unfortunately.