If you're planning on eliminiating the valve, I assume you don't want heat in the winter. The new heater valve is a better design that bypasses the pressure bottle, and also bypasses the heater whenever the AC is on, making it work less hard, and it really cleans up the mess of hoses in the back corner of the engine bay since all the hoses run to the Heater valve instead of to the bottle as well. It's only $16 at the parts store, so just keep that in mind.
Also, for the aux fan, when I did my conversion, the new radiator came with the plug for the electric fan sensor, so I didn't have to put in a new thermostat housing. I got the GDI radiator from Advance Auto parts by the way, it seems pretty good for $125, and has a lifetime warrantee.
You're also going to need a new coolant bottle and some 1/4" hose. The generic ones work just fine and I just screwed my new one into the existing holes using the metal bracket it came with. All in all, I love my new open system, it doesn't overheat, and it's much easier to watch the coolant level and flush without having to worry about burping the system.