If you are looking for a regular machine to quilt on, the Juki TL2010 is a great machine! It's got a large throat area. I love mine. It worked perfect right out of the box. I have not touched the tension even once! It's only straight stitch, so I generally only use it for piecing/quilting. Sometimes I sew general stuff on it, but I don't do much of that anyway. I primarily quilt. So far, the largest I have tried is 60x80 or so. I could handle larger if I prepare my area with an extra table for support. I paid about $1000 for mine.
Some people use the Juki on a frame. I don't have the space for that, so I got myself a Gidget 2 table.