I have a Janome 1600P - it does only straight stitch, and has 9-1/2" width, it works great fro FMQ. I have a New Joy quilting frame which I purchased together with the Janome, and I use it to quilt queen-size.
I also have a Janome Horizon (7700 model), with a wider width, and it's also great for doing FMQ, it has an automatic speed control so I could set the speed to suit my pattern.