Consider using upper cabinets for most of the cabinet space you have and a one or two regular base cabinets depending on the room you have. The deeper cabinets take up a lot of valuable floor space and have a tendency to get filled to the point where nothing can be found in them anyway. The upper cabinets have a narrower profile and just about anything in a sewing room that you want to store will fit in the depth of an upper cabinet without getting over stuffed with stuff.
Depending on how much room you have, maybe use regular lower cabinets in the more out of the way spots where floor space isn't lost.
The depth of the upper cabinets works great for a work space with out having to reach to far for tools.
Good luck with your room and please show us the progress.
peace