Hello,
I use a Icom IC-F3261DT portable for both Ham NXDN and Railroad monitoring. It has Railroad Firmware, which adds some nice features over the stock firmware. A railroad version of the programing software is required and it is not too difficult to get. The program software is setup different than Motorola, but it did not seem to difficult.
I have one zone setup with all the AAR channels in dual analog/digital mode. I also have a scan list setup to scan all the channels. I also have a zone with all the local RR frequencies. One of the yards use MDC1200 signalling and I was able to setup decoding.
73 Eric