I've made a decision to purchase a ham radio to scan the railroad band. I've read that a ham radio is more sensitive than an all band scanner. I've got it narrowed down to either the vx-150 or the vx-170. I'm looking for opinions between the two. I don't plan on getting too much into the actual ham hobby but I think this will be the push towards at least getting a ham license. Is there a difference in scanning/programming/sensitivity between these 2 models? I just don't know which would be the better buy. Again, all I want this radio for right now is better Rx capabilities than a normal scanner in the railroad band. And just to make sure they both have alpha tags? And will this radio work well with a diamond rh77ca antenna that I already have? Thank you for any opinions.