I traded in my 440 and got the 730 to keep up-to date with
the gals I sew with. During this time a gal traded in her 830 and I picked up on it right away. I love Bernina because
my dealer is close. Choose a machine that has a dealer close
by to help in case of a problem. I put my 830 on my quilt frame and use my 730 on everything else. I have a 1973 Bernina that runs like a top. I do have my Pfaff Grand Quilter to sell at $700. My Bernina dealer said he would
sell it for me. That to is a great machine but doesn't have
the stitch regulator.
Go with a dealer that will be close and is interested in your needs and will help. I sew every Tuesday at my dealers
place Good luck.