With RadioDJ you have a couple of options when it comes to encoding software. Here are some of the alternative stand alone versions out there on the market.
Stand alone encoding software frees up the automation software to do what its best.
Going through Shoutcast and tuning into a few random radio stations. Some of them were quite good and sounded brilliant. Some of them however did not. Digging a bit deeper and looking on their shoutcast DNAS server pages the reason for the poor audio quality on some of the stations was immediately clear.