Mpignone, Please except my apology for having a complete brain fade and suggesting those very expensive preamps. I read your question... walked away to attend to something and then came back and was completely off point.
I too would suggest the Ear/Yoshino 834L, or I would offer a Juicy Merlin, Peach, Extreme, Blueberry (don't be put off by the names), PrimaLuna Prologue 5. Just to name a few.
Happy Listening!
