The VideoVision boardset is pretty sweet if you have at least the Studio compression daughtercard; the Telecast rackmount box is even nicer. If it's just a base VideoVision then you should totally upgrade!

I only have experience with the VVS myself, but the NuBus Media100 system is the one I always dreamed of using. I'd say go for that one. Doesn't the Media 100 NuBus system support a small set of realtime video effects, even?