Looking for a zoom to go with the Sigma 18-35

[nhodgkinson]

I'm collection a set of lenses for video and was going to expand my primes but have found to my amazement that the Sigma 18-35 f1.8 out performs all my primes. So I'm looking for a zoom in something longer to compliment this winder zoom, 50mm or 70mm upwards. Dose anyone know any good zooms that would do the job? At the moment I'm looking at the Nikon 80-200 f4 Ais or the Zeiss Contax 80-200 but if there is some newer lenses that would do the job better or faster?
APSc sensor and Nikon mount.