Any reason you are going w/ barbs + those clamps instead of compression fittings? For 50 cents more per fittings you can grab Koolance 1/2ID 3/4OD matte black compressions for Dazmode. Those lamptron clamps aren't generally thought to high of either.
Is there any specific reason you are going w/ the heatkiller CPU block? It is more expensive than the Koolance CPU-370 and not as good as a performer.
I wouldn't recommend a single pass radiator either. There really is no reason for one, as normal radiators are not restrictive.
Skip on the coolant too, just get a biocide additive.
Minus whale buy everything Dazmode too.