Wow!! I never see questions about Quest! I bought one a year ago and after an initial adjustment period when I wanted to throw it out the window...I now LOVE it. When I researched new machines, my top priorities were a larger throat area and a clear 1/4" marking. I only wanted/needed a few stitches. The Quest came with so much more than I wanted, but I love it. The trouble in the beginning was finding the thread it likes. If you happen to decide on the Quest--start with Gutermann polyester thread and it should be happy.
PS I bought the machine from a Pfaff dealer, but didn't try Pfaffs because they were more expensive. I paid $1000 for the Quest--special promotion last year for the older models as new ones came out.