I love my A1!! That said, buying a longarm is like buying a car. Test drive them all. What works for me may not work for you.
Ask around on features. One that came with the A1 was the ergo lift. There are 4 of us who use the machine, with about a foot difference in height. We knew that we'd need it because of that. But, I change the height a lot. Sometimes just an inch or two can give my back or arms a break.
Good luck in your search!