I went to a quilt show this weekend. I got to try the Nolting and the Tin Lizzie. I've never used a Long Arm before. I absolutely fell in love with it. Wish I could afford one.
Not knowing anything about them, I was amazed at the difference between the Tin Lizzie and the Nolting. I liked the Nolting a LOT more - it just seemed to move smoother. The Tin Lizzie came with a larger throat, and an aluminum frame. The Nolting with a steel frame. Much heavier, maybe that made the difference...not sure. But I hope to some day, get one of my own.
I would suggest you go try each one out - even if you have to travel a ways or wait for a show to come along where the vendors will be there with the different brands of machines. It may make all the difference in the world to YOU instead of depending on what others say (no offense to the others - I get lots of good tips here). You just have to decide what works for you - its YOUR money.