I am looking to buy a better sewing machine (not a long arm) to do free motion quilting. I know it can be done on just about any regular machine but I'd like to know what you all use. I currently have a Brother cs6000i which sews just fine but the throat space is too small for a large quilt to pass. Even on small quilts I've settled on doing just straight lines. Tell me everything from top of the line machines to budget friendly.