[aBathingGrape]

im planning to hook up some krk rp5's to my current computer setup and which will also include an xbox 360 and I was wondering what kind of audio interface i would need to be able to take the inputs from both my computer and xbox and output them to the monitors.
 
i only have $200 to spend at most, but cheaper solutions are always welcome.
 
and I would like to used balanced cables, either xlr or trs, although it may not make too much of a difference over rca.
 
thanks for any suggestions and help