I've grown to really like my Pfaff QE4. It wasn't love at first stitch - my first machine was faulty and was replaced after two months, unlike my Janome which I loved from the minute I got it out the box.
I don't think I would buy a machine without a built-in walking foot now and the auto-pivot is brilliant for appliqué. I've also mastered the Sensormatic FM quilting. The only negative is the 4 doesn't have an On/Off button like the new 4.2.