I'm also a Juki owner, but not the one you are asking about. I have the 2000 and love it. It's only straight stitch but I have a Janome 4900qc if I ever want to do anything other than straight stitch or need a free arm... That poor Janome has been shelved for almost an entire year. I have used it ONCE since getting the Juki. I love love love my Juki. I swear I get more done because it sews so flipping fast. Once you get used to the speed you'll be sewing like Superman lol. It also makes a great stitch.
The Juki you are looking at is much fancier than the 2000. It's electronic so I'm sure it's a great machine but if all you do is quilting, I'd look at the 2000 or the 2010. It has a wider throat and only does a straight stitch. If you have another machine that can handle the few times you need anything other than a straight stitch, you might be happier with the work horse.