I have quilted dozens of queen size quilts on my Bernina. You just need support on your left side and you need support behind your sewing machine. Then you don't have any problem with the weight of a quilt. I look at these ads for sit down Long arm sewing machines and it just doesn't make any sense. A larger harp is convenient but not necessary.
If you want the look in the first quilt, then a LAQ with a frame is maybe what you need. I would have just crosshatched the Lattice quilt. The other quilt is just stitch in the ditch and slightly parallel to the ditch. Good Luck with making a decision.
Last edited by ManiacQuilter2; 05-20-2014 at 09:42 AM.