I have had a Bernina for three years which has many fancy stitches, a stitch regulator and does embroidery-- All features which I really haven't used as much as I thought I would.
I also have a new (1 year old) Pfaff 2036 which I use all the time for piecing and stitch in the ditch type sewing. I had made the mistake of trading in a not very old Pfaff which I really liked. In addition to the IDT, it had upper and lower case alphabets that were great for making quilt labels, and I miss that.
They are both quality machines so it depends on what uses you need it for.
My main advice would be to sew on each BEFORE you buy. Good Luck, and enjoy whatever machine you get!!