OK, well, I think you will quickly tire of the shorter throat space..
Here is why.. If you have a 9 inch throat space, you are really limited to about 4.5 inches of quilting space at a time.. the reason?
As you advance the quilt on the take up roll, it becomes bigger and bigger, using up the available throat space..I just quilted a 94 inch long quilt and it was about 4.5 or 5 inches wide when it was completely rolled onto the take up pole.
Does this make sense?