I have been doing SID on the jelly roll quilt on my current machine. Has small throat space (6 inches plus presser foot raise and lower lever) was ok as long as it was just a few rows, butttttttttttt, once the rows turned into a large roll, it became a real mess to work with.
I know this is my first time doing this but am thinking perhaps a machine with a larger throat space like a PFAFF would be better.
Going to go look at the local dealer tomorrow am and see what he has in stock.
I looked up the embroidery one - love it. Large area for holding a quilt as well as embroidery features.