First, I don't understand your problem. Are you satisified with your machine or do you just want something new.
When did you last have your machine serviced? This is really important. One of my friends finally admitted she had never had her machine serviced and has had it for more than 6 years. I drove her to my machine repair person's place [same day service] and now my friend can't get over how well her machine works.
If you want a new to you machine make your own check list: budget, needs, and wants. Are you open to a good used machine? Many quilters do trade up and their previous machines are still in great condition.
Enjoy the journey.