Sample sound

I took a Movie Scoring class at Berklee last year, as well as an advanced orchestration class. My compositions are more in the John Williams style rather than the Hans Zimmer. I am scoring on Sibelius and using Note Performer as my sound engine. And although the sounds seem very accurate they don't have the huge sounds that Zimmer has. The compositions are solid and I would put them up against anyone, I'm just wondering if there is a better program out there to give that huge Zimmer sound?
Thanks Leonard Jones