Native Instruments (in collaboration with Softube) has announced their Premium Tube Series plugins which consists of a Passive Eq, Enhanced Eq and Vari Comp. Check out the videos and audio demos in NI's newsletter below. Download demos of the Passive Eq plugin here. The Vari Comp here and the Enhanced Eq here. (Demos freeze after 30 mins of use). I downloaded the demos and did a quick comparison with NI's Passive Eq and UA's Massive Passive Eq plugins. I found them to be similiar with NI's being slightly smoother on top but UA's having more girth.