I have a viking sapphire but may need another large-throat machine for use with a frame, so i dont have to switch back and forth. My machine budget (if i have one, lol) is $1000 or less....
I have not used either frame, so i am not really sure. I will be at a quilt event in a couple of weeks and may see one there. It looks lime grace makes the bernina frame, to further complicate things.