So if i had nf-f12 x3 and a Phobya G-Changer V1.2 420mm Triple Radiator would be good ? any revsir are pumps come to mind ? that will work in the case ?
It's a 360x60 radiator. Any 360x60 is overkill, but good ones off the top of my head are XSPC, EK, Phobya, AlphaCool, and a few others I can't remember, maybe someone can remind me.
You don't need the NF-F12s, a set of SP120QEs will do just fine. They are somewhat quieter, so with a fan resistor should run completely silent, and will do the job pretty well for you, even if you throw a graphics card in the loop at some point.
With pumps, basically the best thing you can get is a D5. Plenty of reservoirs available to suit your taste (bay, tube, etc). I have an XSPC 750 dual bay pump-res, it does the job, though it's not liking the GPU block and all the fittings I've got in my loop, so I'm going to get a D5 at some point (hopefully).
The res is pretty much your choice as far as I'm aware, saw a small tube D5 pump top/res combo by EK on specialtech earlier today, I think it'll do the job nicely. If you want something bigger - you can throw a longer cylinder on it and that should have you sorted

. Or you could get a bay res, depending on which look you like better. I like the bay reservoirs for ease of installation, but the clips to hold a tube res in place are fairly cheap as well and you can stick the thing pretty much anywhere you like in your case, so especially if you like the look of a tube res, it offers more customisability. Have a think on it and see what you'd like.