I have two Pfaffs and one for quilting. The older one does a good job on the 1/4" with the 1/4" foot but I still have to pay attention how I feed the fabric. (Love the built-in walking foot). My newer Pfaff is very persnickety with thin fabric and it sucks the corners down into the feed dogs (even with a leader strip) Regular cotton piecing is handled quite nicely.
If I had to do it again, I would check out the Janome.