I'm not familiar with the Singer Touch & Sew models - they may have been the next generation machines.
To the other Slant-o-Matic owners - I agree, it is a true work-horse that shows no signs of wearing out. I do have a Baby Lock Quilter's Choice Professional that comes close - metal parts, semi-industrial motor, solid and smooth as can be, and is a mechanical mathine. Not a lot of extras, but, again, a true workhorse. I tend to use the Baby Lock these days, because I think I'm "saving" the Singer by not using it so much. I have this idea that the Singer is on "borrowed time" and I don't want to "break" it.