I have had a 150QE for years and still take it to sewing bee and short retreats. I also had a 200/730 which I just sold as I now have the new 830. I agree with Candace the 830 is heavy and not just plastic. Have a friend who has the 440 with embroidery and she really likes it. As others have said, a trip to the Bernina dealer is definitely in order with time to spend checking out each machine. You can compare features on some of the machines at berninausa.com.
Good luck with your research and purchase.
mltquilt