If you are looking for a quilting machine, I would suggest saving up a little more or looking for at least a 9" harped machine. You will be trading one 6" for another 6".
From what I have seen, the "quilting machines" sold just include some extra feet for quilting and whatnot. You are really going to want more neck room for maneuvering quilts. You might score one on Craigslist or from a dealer used as a trade in :)