I have a set of Grado 225's that I use for listening at work. Currently they are just connected to a Rolls mixer which is fed by my MacBook Pro and iPhone. Eventually I want something like an iDecco or MusicBox to drive these, but that is not going to happen for a while. In the meantime, I am looking at the E10 or EF2A to take audio from the MacBook Pro and drive my Grados. I have not used either product, and I was hoping to get some feedback from people here. I am leaning towards the EF2A just because I like what tubes do to music. Any opinions one way or the other on the two amps? Thanks!