Go to a dealer and try each one. A long or mid arm on a frame is different than a sit down machine. The machine on a frame you move the needle - so it is like drawing. With the sit down machine it is like quilting on your regular machine except that you have more room - so you move the fabric. I bought a frame and put my regular machine on it with a small throat space. I was able to quilt 3 bed size quilts on it. Of course I had a very limited quilting space so I only did a meander. It's all in what you want. That is why I suggested you go to a quilt show or dealer and try the bigger machine to see if you like it.