Sorry, but need more information:
Do you plan to FMQ or quilt with a walking foot? Or to piece the tops and quilt by check? Are you interested in embroidery on your quilt or quilting in the hoop? What size(s) quilts do you plan to do?
Are you also planning on garment sewing? Other home decor quilting?
What stitches do you need on the machine? Straight stitch, yes, but what others? Zig-zag? Buttonhole? Fancy stitches? Stitch out an alphabet for monograms? Read/stitch digitized designs?
Automatic needle threader? Needle up/down? Start/stop button on the machine? Knee lift?
Finally, how much do you want to spend?