I have almost an identical setup with similar purpose except I wont transcode..  node case, same mobo, however I went with a pentium G3258 processor and crucial ram.  My problem is the bios on my board was shipped with 1.6 so I cant run any haswell-r processors.  Asrock is sending me a new bios chip with 2.1 on it, but until then I am stuck.   You will be ok since your chip is good on all bios.  I even tried to source an older haswell locally, but no one carries them any more.  I went with the a seasonic g360 - gold non modular.  Its a nice power supply but its not modular so cable management was a ***** in that case :)  Hindsight being what it is, I would have spent the extra $$ for the modular.  I too am debating the red vs green.  I think I am going with the greens and will run wdidle.  However, as I was reading through that thread it seems that there is some question on weather or not the new green firmware doesnt work with wdidle.
good luck!