I've been told viper twins are the best for lvl 36 pvp.

But I have trouble believing it because I see so many 36ers with the immortalius and firebrand weapons and I know relic axes are worth a fortune. All that time and effort can't be just for show, right?

So I thought I'd open it up for discussion. What's really the best weapon for a lvl 36 toon in pvp? (setting aside the difficulty of obtaining it)