I would definitely try out Pfaff, Bernina and Janome machines at dealerships. The Pfaff is really nice for piecing because of the built-in even feed, but the placement of the presser foot lifter drives me nuts! Love my Bernina 1230, but it's a really old machine now; not sure I would love the newer Bernina's as much (haven't tried any out lately). Janome offers a lot of features for less money (I think) than Pfaff or Bernina.
It's a lot like buying a car. You need to test drive one to figure out what you like and don't like.