I'm looking to purchase an analog mobile radio dedicated to receiving railroad frequencies. Right now I use a Radioshack scanner with an old tri band antenna, which works alright, but I'd like to have one set up with a high gain VHF antenna tuned for receiving rail. What does everyone use or recommend? I'd like to get my hands on a NXDN radio to go ahead and be ready for when rail decides to change to digital, but unless I can find one for a decent price, it will have to wait. Also, what would everyone recommend as far as high gain antennas?