If I were starting out, I would probably look for an entry level Innova such as this one, either new or used:
http://www.innovalongarm.com/shop/in...ge-detail.html
So *much* depends on your budget, it's hard to make suggestions other than to try out a variety of machines. Quilt guild shows are a good place to do this.
If your budget does not allow the Innova, then I would look for a used system. I ended up with a Voyager/Hinty setup purchased from a quilt guild member who was upgrading. Others have found deals on Craigslist and from the two online websites that list used machines for sale.