I have bought the 8040 and the EX5 and they soundd GREATTTT.
Thank you very much.
At first I was a bit concercened because they sounded a too bright and dull. Then I ajusted the Treble tilt control to -4db and now they sound great. I don't know if it was the ajustment that made it sound better, or if it was my ears that adapted to the new sound. Well, the important thing is that now they sound great to me, I'm hearing sounds that I have never heard in the songs that I used to listen. This was the objective, the sound is very accurate, and the bass is good enough I guess.
Thank you very much for you help. You are awsome.