Currently I run an Apogee Jam into a Mac (Mainstage 3) and out that directly to a Sansamp RBI and so on. I'm looking for a way improve the output from the Mac. Perhaps a DAC or something. The Apogee Gio is a little out of reach right now. Even though everything sounds more or less okay as is, I'm having trouble with the idea that a crummy mini output jack is ultimately feeding a 1000 watt power amp. any suggestions would be appreciated. Thanks.