I can get an envoy but i dont know wich one to pick?Which one do u think is better?

If you are talking for play in an official tournament using the Advanced Format, then there really is only one choice.

But status wise: scary, Secret Rare (which they dont make anymore), powerful enough for the history books, much less the Ban List...then CED would be my choice. Just remember, for official use, I doubt CED will ever see the light of day again. That does make a difference to a lot of people to whom you may try and trade it to. Dont break yourself to own one.