It depends on what you want to do with it and what you can afford. I have 4 machines because I use the different features. I have Baby Lock, Brother, Husqvarna and Pfaff. I use the Brother the most. Would also like to get the Bernina 830 but can't afford it. I have used friends' other branded machines to assist them sew or mend, do minor repairs or help with quilt projects and they were lower end models that did not appeal.
My advice is that you don't need to buy a machine with all of the bells and whistles on it if you are not going to use them.A good utility machine can work wonders in the hands of an artist.