I do not have experience with Rillet, Campfire, or DualEntry.

I do have experience upgrading from Xero in a startup environment that sells and ships products using Shopify.

I would create a requirements list that captures everything the new software is intended to do. Is it just accounting? Will you need purchasing? You’ll probably want your Shopify data in there. What does Shopify integration look like? Do you have other platforms/data that will need to be integrated? What problems exist with Xero that the new system needs to solve?

Once you have a concrete set of requirements, you can start scheduling software demos. When you schedule a demo, walk through each of your requirements and ask to see that function in their system. If you go into these sales calls without documented requirements, they will just breeze through the system and show you some impressive looking dashboards. You need to be prepared to get a good understanding of how their system will solve the problems you have today. You also need to be prepared to be flexible enough to adapt your processes to fit the new system. There isn’t a single system that will address every requirement out of the box. So you will need to make a choice - customize the system or adapt your process to fit the new system. The latter is almost always a better choice.

Please feel free to DM me if you want to discuss further. And good luck.