I have a Viking Designer 1. I bought it in 2003 for 7K. It takes a floppy disk. Since new computers do not come with a floppy drive, I bought an external floppy drive to transfer designs to the machine. The Viking software will not recognize the external floppy drive. There is a $500 USB upgrade available for the Embroidery /sewing machine . I use the embroidery machine for quilt labels, and name tags, mostly. Pretty costly huh? I made a couple of baby quilts, and put names on work jackets for co-workers, and monogramed pillow cases for my son when he went to college.
Bernina connects to the computer with a cord. Smart move if you have a lap top computer. Janome uses a smart card like cameras use. Try to find the lowest capacity card. It will take the embroidery machine too long to read a high capicity card. Most new smart cards are high capacity. You will need embroidery software too. Do the research before you make a purchase. If you plan to make a lot of embroidered items, you will enjoy your new expensive hobby. Each design needs stabilizer, and lots of embroidery thread in different colors.
Personally, I'd buy a used machine. Today's top of the line embroidery machine will be selling for half the price in 5 years or less. Send me a PM if you have questions.