goback3turns

Hi, i've just got to level 70 range, i had a dragon 2h X bow i was using with rune darts, but my clan keep telling me to go with the dark bow - dragon arrows. i'm a little torn... firstly, I don't understand how a 100k Bow, is better than a 9mil X bow. and also, i just bought and tested the dark bow, i only spent 5mins and wasn't very happy. Am i missing something with this Dark Bow? Thanks!