I, too, would suggest you go to the shows, but more than once. The first time to look and see and learn whaat you can expect from the company: good help assistance, a local expert at a LQS or an area educator who is available. What kind of frame comes with the machine: how adjustable is it for height and length. [You could move and and have more or less room available for it in your home.] Keep good notes.
Then after that read carefully your notes and prepare your list of needs vs wants. Also compare prices. Getting a computerized LA can be almost as expensive as a small house. Measure all the available places in your present home that you would want to put the machine. Take these notes with you for the second visit and also see if you can make a deal or at least free financing.
BTW I have an HQ and have gotten great service instructions when we moved it and then got an updated trolley.
Make it fun. If it takes you two years even.