i have a grace pinnacle and i'm very happy with it.
the only advice i have for you is thinking about what you will need in the future because many of the grace frames are small and you won't be able to do a king size quilt and some can't even do a queen size.
also think about the throat space, you might want to start with a 9 inch throat, but as someone said, this is limited, the small grace frames will not allow a large throat machine.
if you buy the large grace frames they have the ability to grow with you is size and throat space.
so while a $400 frame might look nice on the surface its only good for small sized quilts and machines.