If the Brother is identical to the Grace Q'Nique 15/Block RockIt (which it appears to be), spend some time on the Grace Q'Nique owner/users' Facebook page to research the issues folks have had.
I would be much more inclined to consider at a HandiQuilter model than a Grace one. The support from the HQ factory is great, and there are lots of online tutorials/videos as well. The frames are more robust, too.
I researched both and ended up with a HQ Amara.