Just to let you know that support for RailCom in JMRI has been available since version 3.0 - see release note at:
http://jmri.org/releasenotes/jmri3.0.shtml
Note that the DCC4PC reader isn't supported under Windows, but works fine on Linux and OS X.
RFID is fine, when using either the MERG kits or derivatives based on the COREID protocol.