Hi Teri,
I bought a new Bernina 2 years ago, the 730, and I also have a Pfaff 7510, which is 16 years old. (I don't know why I thought I needed a new machine.) At any rate, I keep going back to my old Pfaff. It has an automatic walking foot that I honestly cannot live without. I love the Bernina, don't get me wrong. The stitches are beautiful. I love the automatic thread cutter and auto start, etc. etc. However, that walking foot just can't be beat.
I am sure there are wonderful features about every machine out there. Do your homework and good luck on your decision!