I prefer to keep machines for a very long time but seems recently I have been in a purchased, traded, sold cycle for various reasons. have a few vintage Singers, Pfaff 7570, Bernina 900 Nova, Janome 11KSE, Babylock Jane, and former owner of Viking 1+, Janome 9700, Horizon 7700 QCP, Bernina 830E and 780E. I prefer the Pfaff IDT over the Bernina Dual Feed. My must have features are the ability to move the needle by increments, needle threading mechanisim-not necessarily an auto threader, needle down feature, ability to use the machine without the foot pedal, and an auto thread cutter. I find that the European style of machines seem to have the needle movement function more fine tuned vs the Japanese manufactured machines. Most of the multi-function (zig-zag) machines allow needle movement, however, some have the movement pre-set. Having the ability to move the needle in small increments is especially important when doing machine applique. I purchased the Janome Horizon 7700 for it's many features but when doing machine applique, such as a blanket stitch, the stitch settings were preset to where I couldn't decrease the width of the stitch beyond 2.0. I checked with my dealer, who said the settings could not be adjusted so I sold the machine. It was a good machine. I enjoyed using it's many other functions but moving the needle by increments was a test that I didn't perform thoroughly during the store demo; realized it months later when it was time to work on a machine applique project.
I rely on my old Pfaff for machine applique and when that machine finally gives out, I'll buy another Pfaff. I gave my Viking 1+ to my daughter in law; it also has beautiful machine applique/embroidery stitches and a few other nice features but I was unhappy with the piecing long straight seams and the ability of the feed dogs to grab the fabric smoothly. Janome's have excellent feed dog systems; great for piecing, as does my Bernina 900 Nova, my vintage machines and my BL Jane. If only there was a way to capture "all" of the favorite features in one machine.