If you're looking at a sit down machine, HQ has a nice table for theirs and extension tables you can add to the sides for more quilt support.
Baileys can be used on a table but you would have to have someone custom make a desk or table into a sewing table that will support your Bailey machine. They don't have a table available to buy.
Remember with Sit down quilting you move the quilt around under the needle just as you would on a home sewing machine. With a mid or long arm on a frame you move the machine around over the stretched out quilt layers. Each takes time to learn the skills to do them well. Good luck in your search.