Would be great if you were more direct with what side of the pond you were talking about.
Outside of that, there needs to be clarification here, 60 Raiding =/= 60 tinking. There are no 60 Raiding guilds that try to maximize gear to be able to compete in PvP (on US). There are no 60 tinking guilds that try to limit players into only running 60 only raids (on US). Its very hard to have both in the same guild, as the requirements of most 60 Raiding guilds will cut back on your ability to even exist in the same instanced PvP as a tink.
As for PvP, Id suggest play what ever you want but you might want to play with a friend as BGs on both sides of the pond now struggle to take place (EU is in the works tho), so Arenas is the only PvP this bracket currently sees - not counting wargames.