I decided that the radium plate was my choice. Yes I like the look, and the additional air/oil flow plate/dam. The integrated screw in PVC valve on the eco boost plate kit is a nice option. If you decide only the plate kit the ecoboost one will hook up just like OEM.
Diamond kit has better options on the various fittings, hose barb sizing, three ports for more OCC venting/routing/types of oil tanks.
Now in my applications I use that and the JBR OCC kit and the JBR optional back-flow Boost valve on Intake manifold side after the OCC.
I know its redundant but I prefer the crack pressure on the Radium PVC valve, and the robustness of the JBR boost backflow valve.
Now while I understand your desire to install and forget it once Intake manifold in place, I will tell you now....Modifications or repairs will require the manifold to come off. Sometimes, like in my case...........many times and its really not that hard to do, since especially you currently know how too.