What is the best dimmer system?

I had an ETC Unison DR rack with house lights and spot lights, wall controls and a DMX input dimmer system but it broek down. So now I'm looking for a new dimmer system. What I', looking for is: - 2 or 4 chan - dmx in and out or through (I can work with whatever connectors, 3/5 pin etc) - each chan able to handle a S4 with 575W lamp - Pack able to handle all lights all the way on. Any recommendations on approach or specific packs or brands (or packs/brands to avoid)?