If your back hurts when cutting fabrics try raising your table height. I have an old kitchen table in my sewing room for a cutting table and my back was killing me when I tried to cut so my DH Put blocks of wood screwed into the bottom of the legs to give it a boost. My back does not hurt when I stand there and cut now. Hopefully after your surgery you'll be back to normal.
I have not tried a Accuquilt Go. The dies are so expensive and since I never repete a pattern I just can't justify the expense If I had someone to share dies with, maybe I would. Hopefully the price will come down one day when the new wears off!