Honestly, this is like asking which alcohol is the 'best'.. its based on preference.
Is 'best' meaning easiest? most features? compatibility?
I edit daily on either FCP or Avid symphony, and if I can make a hybrid of them both, that would be the best. Well, maybe 70 avid and 30 FCP. But understandable learning Avid is a milestone.
I feel premiere has got the edge because of the integration with the rest of the adobe suite, for me is After Effects.
Try a few out and see for yourself! Thats the most important, whats best for you, not whats best for others.