i woulnd't say its worth it cause your still running mini>xlr coversion, therefor having another break in your linage, i'd stay with the mini, it would be a lot easier, xlr is nice yes, runs a cleaner, hotter signal, and its neccesary for mics that are made with xlr connections, i'd stay with what you have. its easier. save up for something else. more mics, pre amps. deck. i take it u are using either a MD or JB3 for coax outs. good luck.
matt