We are in a buying process of catalyst 4500 to replace the 6006 (endofsupport). We are a broadcast tv station with 400 users unified in the same building accross 4 flors with 35xx switchs linked with fiber (GBIC), step by step we are introducing video in desktops(production users) although there are another networks for video broadcast not merged, so we want to chose best option (tailored to our size and future convergence) of supervisor card: II Plus or IV?

Thanks