You have to be honest with yourself and ask yourself if the potential new speakers truly sound THAT much better than your current speakers.
Or is the grass just greener on the other side?
It is very subjective. You've seen polls on what people think are the "best" speakers. The poll results are all over creation.
You ask 100 guys. You get 100 different speakers.
What are your objectives? Aesthetic? Pride of ownership/resale value? Popularity? Detail/resolution? Bass?