I had a 6600 which is comparable to this machine and I also used to have Pfaffs. This will be a great machine for you. My 6600 took anything I threw at it. It was great on stitching through thick seams - like purses. I seldom ever used the walking foot - I just decreased the pressure on the presser foot with the knob on top of the machine. I did love my Pfaffs, but I miss my 6600. I did all my sewing on it for 11 years in my quilt shop. I sold it when I sold the shop and now sew on a 9900.
I hope you love your new machine!