The Juki LA is simply a rebranded Tin Lizzie. They are the same manufacturer and the same machine, the only difference is that it has a Juki logo. Much like the baby lock longarms are rebranded Handiquilters. You may just be trading your problems in for the same.
I agree that you should wait for a big show to come to your area and try out many machines and do your homework. I have an Innova and I absolutely love it.