My favourite is my juki. It is the basic model and only does a straight stitch which is limiting to other patchwork sewing. I have a Bernina 440nq for fancy stitches which has a small harp. Both these are heavy machines and don't move far when quilting. I do have a husqvana Viking 100h which is my light weight machine for classes. This runs all over the place if I try quilting with it.
you need to have weight in a machine to hold it still but I'm sure as you only mention one machine you will be looking at stitches as well. Juki and bernina have these machines but price you can pay will have a say.