That's it, I decided to try the famous string Elixir I hear about in the forums .... AF
After 15 days of use on my Seagull:
the +: Crystal clear sound and brighter
The facilities are quiet and dragged by ropes coating
The lifespan of the game, and the fact that the strings retain their characteristics.

the -: The price (€ 20 to the game .. ca quiet!)
Low a less
The affected different, especially figerpicking (maybe just a habit!)
The holding of agreement less reliable over time

Well at least I tried, but I think I will stay in pulling the same, true to D'Addario.
Although the life of Elixir looks promising, the price difference (and his!) Does not seem justified ...