One reason you need it is that it is so heavy duty- That baby will sew through anything you can get under the presser foot. Like a hot knife through butter.
I opted for the 15-91 when I got some advice on which one would help in making bags. And it is in a cabinet and sews beautifully. I also have a 301 (my "portable"). And a Juki 98 Q, which, I must confess, I love to death!
You could, with a 15-91- sews new jeans for your husband....