Thermal Paste

I have a brand new tube of Noctua NT-H1 and a 6 month old, half full tube of Arctic Silver 5 thermal compound.

My question is: Which should I use? Which one will yeild better results? I know Arctic Silver 5 is the good old-good old of thermal paste, but will the noctua thermal paste be better?

I'm going to be using this on my Bitfenix Prodigy build that I will assemble tomorrow.

Specs:

ASUS p8z77-i deluxe

Intel i7-3770k (XIgmatek Dark Knight)

16gb ripjaw x ram

EVGA GTX 760 ACX SC

120gb OCZ Agility 3 SSD

1.5TB Seagate Barracude

All in a cute lil bitfenix prodigy.

noc.