All traditional pronunciations are equally correct.
In fact, there were several dialects of Hebrew throughout the centuries, even contemporaneously. Thus, we had at least a dozen pronunciations, even from the start. Frankly, I'm tired of the inferiority complex Ashkenazim are given about their own history. Be fully aware that you are no less right than any one else. Just because Zionists chose a different approach, most assuredly does not invalidate yours.