Which nice Online-RPGs do you know?

[Nightmare]

Hi,

I want to get a new game of this genre next month.
I played some completely free games, but I didn't like them.
So it should be a game which is in a shop.
But a very important point: No monthly costs!
(Because I don't want to force me to play!)

Some people told me to get Gothic 3 or Neverwinternights 2.
Yeah, but I don't want a game which also contains an Online-mode, I want a real Online-Game like WoW, Guild Wars etc.
(No problem if the Online-Game also has an Offline-mode, f.e. this game: )
At the moment I'm thinking about Phantasy Star Universe

P.S. I already own Guild Wars, but I don't like it anymore

Thanks for any help!

Greets