Are you serious about compositing and production.
As a trainer at, I can tell you they most all higher end facilities use NUKE and/or After Effects as part of their compositing. Its rarely just 1 tool for the job.
What is NUKE?
Have you seen: Enders Game, Tron legacy, Looper, Inception, Prometheus, or any other heavy VFX movie in the last 10 years? More often they are using NUKE.