I agree, the Fulltone collection is great, especially chorus and delay modules. As for distortion, I think Wampler Pinnacle is better. But my opinion is based on playing real pedals. It is possible, that OCD implementation in AT4 is better than the Pinnacle.
FWIW, will we ever see other brands' units grow into collections? Like T-Rex, Wampler, Engle, DrZ?