base your decision on a machine which you can get serviced where you live!
you should go out and 'test-drive' as many machines as you are able to...find a reputable sewing machine dealer who offers owners classes, and service and purchase from them...if you spend $2000 on a machine you never get to learn to use...or can not get worked on or any tech support it becomes a very expensive paper weight. you should not spend that kind of money without at least trying out what you are getting.