I have two Brother ULT's 2100 and a 2300. They use a floppy disk and also a card. I had the brother 150 for a long time but wanted to go up to a larger embr. size. so mine does a 4x4, 5x7 and 6x10. When you start to purchase a machine think ahead for the future because they do last a long time.
with the three sizes of embr. designs you can do a lot of things with it. I really like mine I purchased mine used. One from a Brother dealer and the other one from an person.
Good Luck