Brother CS6000I

Poking around, it looks like the Brother CS6000I is a great choice for getting started with quilting.  You can find it for under $200, and it has all the key features needed for quilting.  It's also a good machine for general sewing and has a 25 year warranty.

• 60 stitches include a quilting stitch
• spring quilting foot included
• bed extender included
• powerful motor

This model is popular and very well liked, and with the usual discounts it's an amazing value.