I agree wholeheartedly with PaperPrincess!!
You can check with your local dealers (Brother, BabyLock, Viking, etc) and see if they have a used one at a reasonable price. There are SO MANY designs out now that "quilt in the hoop" that I'm certain you will find yourself using it more than you expected. Get as large a hoop space as you think you can afford... that same "hoop space" equals "harp space", so that means you have more room for quilting as well.
Definitely keep your old machine for piecing... you can piece while the other machine embroiders... multi-tasking at it's finest!