I have the 26" Innova with MQR robotics. I can quilt up to 21-22". Have never had any issues with loosing space as its rolled up on the takeup roller.
When I decided to upgrade from an 18" I went for the 26" instead of the 22" due to the robotics. I can use larger patterns instead of having to down size them or split them and do them in 2 passes. I quilt just for myself too.