I have a Bernina 820 and I love it. . . . But I am a gadget person. I just love all the neat things it does, the fun things I'm learning, etc. BUT no one machine does everything perfectly. I've had them all and each had it's good points. I still think the Viking Saphire was the best for just piecing. No I'm not giving up my Bernina but that old Saphire was a gem.
I really think the machine you like depends on what kind of sewing you do, your like/dislike of new gadgets, patience in learning ways and the list goes on. Try as many as you can.