I have 3, a brother 929D, Jancome compulock and pfaff 4874.
I like the brother because of the free arm capability, handy for doing cuffs and the bottoms of pant legs. It's a royal pain to thread, but once threaded it stays that way.
I have probs keeping the Janome threaded, but that may be my fault, not sure yet. I have the pfaff set up for cover stitch and love it! Wouldn't trade my sergers for anything!