Did it.
Bought the Brother 1500S. That is really a nice machine. Stitches well, smooth, and isn't too much of a bear to set tension etc. on.
Tried some free motion. Did far better than the Pfaff and like having the extra room Mostly stayed on the lines - will have to learn to look ahead in all directions. Only real hiccups were when I moved the fabric up. At least you can see through that quilting foot. It goes slow enough to deal with right now. Will save a lot of time. I might have to get an open toe, as that is what I do stitch in the ditch with. I like being able to regulate the foot pressure. It helps with heavier fabric.
The fabric doesn't slide on the table as easily as I'd like - what cures that?
Length of the fabric usually won't matter as I do QAYG. I have no intention of getting a frame. No room for one, and I've tangled with getting a quilt on one and I don't care to do that again. You need six hands.