I am lucky - I have 2 machines and think both are great ......... the Millie and the 26" Innova. Both companies offer outstanding service. Personally, I find the Innova easier to handle than the Millie (I do have the ER wheels on my Millie). No matter which way you go, I would try to test personal machines and not just those in shows. Personal machines are generally set up better than those in shows and will really give you an idea as to what feels best for you and what the stitch quality is. When I purchased my Millie, I spent time (paid for) with 2 different women - one had the Millie and the other the Gammill. I was able to handle the Gammill a bit better at that time, but I much preferred the stitch quality and ease of maintenance of the Millie - therefore, I purchased the Millie. I was also swayed by the openness of this forum. When I purchased my Innova - it came about because I tried a friend's Innova and was wowed. Each machine will have pros and cons according to what you are looking for. Make a very careful list of your needs and wants and then go from there. It is a big investment.
Long story short - try everything you can & look very carefully at the after-sales service (company and rep/dealer). These machines are workhorses, but things do happen and you want to know that someone will always be there to get you up and running again - it is not like the normal item where you just call the service man out to your house. You will work on your machine at some point and it is worth everything to have someone guide you through and hold your hand over the phone. I have found both APQS & ABM International (Innova) provide this type of service. I can only vouch for these 2 companies - have not dealt with other companies but there are other excellent machines on the market.
Good luck!!!!!