A friend I trust said with Monks getting Run 8.. make a monk on Zek. Monks can basically stun lock most anyone and suddenly having higher run speed than anyone (cept Bards) equals imbalance.
In the early levels.. it's hard to argue with an Orge Beastlord (and win).
I believe Necros do alright.
I have never heard of a Bard loosing in PvP.. cause you can't catch them.. but I have never heard of one winning.
There never has been a "Best PvP Class" It's all lvl,gear,aa's and the like.Play what you feel most fit's you,learn your class and most of all...Kick some a$$