Being new to Gti ownership I have not had time to make a full list of recommended mods/upgrades.
But so far my shopping list is;
NGK Iridium BKR7EIX spark plugs
OEM R8 Red Ignition Coil Pack Set coil packs
Ferodo DS2500 brake pads
Subframe Bolts and Shims: N90823501 - 7M3499349A
Audi RS4 Fuel Return Valve
Divertor Value Revision G+ GFV mod?
Just wondering about a couple things on your list.
R8 Coil Packs? Pretty sure there is zero advantage in having them, other than their colour. Otherwise, if your coil packs work, then no point in changing them. I think some people do change to R8 packs because they have fitted some induction kit which means they can no longer use their stock engine cover, and so it injects a bit of colour to the bay. So if it is purely an aesthetic change, then fair enough.
And the DV Rev. G. As long as you already have a rev C or above, I believe, there is no point upgrading if your planning GFB-DV+. The Solenoid is the same, which is the part you keep with the GFB-DV+. So That also seems like a waste of money.
Unless, of course, you are already needing new coil packs, and your DV Solenoid is gone, in which case, fill your boots.
I also beleive that the RS4 valve is only really required when going stage 2+. So as your list of mods is purely service / aesthetics at this stage, I'd leave that until your mapping your upgraded HPFP'd engine mods.