I will be hooking mine into a Roland TriCapture, which is an excellent entry-level audio interface that I heartily recommend. It has balanced 1/4" outs, so yay! Really, the TriCapture is "bare minimum" territory; if your computer setup doesn't have balanced out, your money might be better spent on smaller/cheaper monitors + a better interface.
Interesting fact: Yamaha's 8" HS8 model costs roughly twice the Massdrop+tax price of these speakers...