In a studio environment (where they actually make this noise that we like to reproduce...hehe) balanced wiring with XLR connectors are generally used. In theory, they're more resistant to induced noise/hum on longer runs. For a short run (typical of a home environment where the amp and pre-amp are likely next to each other) using a good quality unbalanced connection should be just fine and may also offer a bit more voltage gain....which I believe is the case on the Outlaw amps. Unless you've got a very noisy (in terms of EMI/RFI) environment at home, it probably won't make any difference.

Best,