Is there going to be a big quilt show near you soon? They usually have all the machines set up so you can play with them all and get a great show special too!
Keep in mind they're sometimes glitchy because they set them up quick, so might have some balance issues, but you'll get the general feel of the machines.
I've narrowed my choice to the innova. I like the removable sew head and the optional cording attachment.