The IR of Waves!
Vienna MIR Pro for orchestral, Altiverb 7 otherwise.
my favorite is WizooVerb
I use 2c Aether, but later I started using Breverb (built-in Sonar X2)
My “go to” VSTs are actually IK Multimedia’s Classik Studio Reverbs. Very flexible and good sounding.
I think lexicon 224 the best of the best in my opinion.