I have a Tin Lizzie 18 and love it. I bought mine second hand over a year ago and got a good price. I have quilted many quilts on it. The Tin Lizzie company has an excellent service reputation (I haven't needed to call them for any problems). There is a Tin Lizzie group on Yahoo, the people there are a wealth of information. There are two models, the new Tin Lizzie LS and the older heavier model (I have the old one). My machine moves beautifuly, is reliable, a great machine. It has all the bells and whistles. I wouldn't trade it. :)
Good luck with your research and purchase.
Mary