Also coming into play is what else you want it to do? Heavy quilts? Will you want dropping feed dogs for fmq? Do you want it to handle heavy thread? Does it need to have decorative stitches ? Do you need Zig Zag? Does it have to have reverse ? I can think of numerous machines that fit one or more of those, very fit have all. What feed type? Needle, drop, walking foot, combination.
Make a list of the features you want, or have to have and we can suggest more closely.
Dan