Go to Wmt or Overstock.com and buy the Brother Project Runway. It even comes with the 1/4 foot! Great buy, reliable, and under $150. Has a 25 year warranty on the motor and self-threads.
I love mine. I've had it for 2 years and made about 20 quilts with it. I've only had one of those quilts long-armed. This machine is lightweight, but really works hard.