Using Roland Rbus I/O devices as controllers

I have a Roland SI-24 and a VS-2400CD that I'm hoping to integrate into my recording station as controllers for Sonar. Does anyone know how well these work with Sonar and/or use them? I'm hoping to use a PreSonus V-Fire RBUS-FireWire interface to allow the Rolands to talk to my FireWire PCI card.
 
Here are the mixers:
Roland VS-2400CD
Roland SI-24
 
 
Here is the PreSonus V-Fire interface:
PreSonus V-Fire