Check out the Innova, made by ABM International (family owned/run in Texas)
http://www.abminternational.com/inno...ng-machine.php
The have 24/7/365 real person tech service, even if you just need help with tension. I've had mine for 2.5 years and it has never needed service. The Innova is made to commercial standards and comes in 18", 22" and 26" sizes and it is the only longarm that has an option for a couching attachment that allows you to quilt with the couching material AND have straight-line quilting on the back of the quilt. Not cheap when you are going for computerized systems.
Also check out the yahoo groups for all the longarms...you will get the honest opinion of users, not a rep/dealers sales pitch. Also check out the machines on youtube.com...some of them have such an awful noise I would not be able to stand using them at all!
There are so many out there...also check out Renae Haddidin's website -
http://quiltsonthecorner.com/ - and do a search for article on buying a longarm. She gives you things to think and ask about...stuff I never even knew to ask about! She does have an Innova, but the article is not a sales pitch for Innova, just a great information piece on longarms.