I'm thinking of getting a small, unpowered mixer , strictly for learning tunes, as I am getting more and more disenchanted with the typical headphone amps I have been using, ( Bass Buddy , Tom Scholtz, etc ). I'm looking for something that has instrument input capability, separate volume controls for headphones and Aux in. MP3, or stereo input, and some rudimentary EQ. The number of channels isn't important, although I'm obviously looking for something small, to sit on a desktop, in front of my PC. I've checked out the usual culprits like Mackie, Behringer, etc., but I don't see where they say that they are instrument input friendly. Anybody have any suggestions, favorites, etc ? Thanks.