I'm a Canon guy (thus I have 0 background in Nikon stuff) but sice I had a Red zoom reserved I realized I needed to buy Nikons until that ships.
I remember back on DVXUser Jim mentioned the biggest drawback of using still lenses is the small focus throw (or, how much of a barrel turn to go from the closest focus point out to infinity).
So recently I bought two good quality used manual AI Nikkor primes (50mm 1.4 and 135 3.5) and was amazed at what a long focus throw they had in comparison to AF primes! Wow! An AF prime has only a 1/4 max barrel turn, and trying to pull focus with that small or a radius would be so hard. But these manual lenses rotate almost a full 2/3, more than double the focus throw of an AF!
Dang, I had heard that manuals were better for general construction but in my mind, having more than double the focus throw makes a manual Nikkor vastly better for Red.