If You had to choose one of those, I'd Say AK-Knife -Just Because I love AK's.
Or D-E Gold Because, Even Though You Have A Deagle Already This Is "Special" in The Eyes of Many.
However, I Think The Most Intelligent Choice, Would Be To Save Up to 100, And Choose the AK Gold (Or M4- Gold) I just Love The AK design Lol.