what machine are you sewing on now? i bet your own machine is every bit as good as that brother machine...just because they are putting 'quilting-machine' on the box doesn't mean it's going to stitch any better, it's just a gimmick to attract the market. unless a machine is a mid-arm or long-arm i would not waste money on a different machine for quilting unless i needed to replace my sewing machine. that is all the brother is,(and probably with alot less stitches than your machine)
it may come with an extension table for quilting but you can probably buy an extension table for your machine for alot less than $199.