The best consumer scanners made for railfanning were made 30+ years ago. The Regency HX1000/1200/1500 are pretty much the gold standard. Any of the Bearcat 210 form factor rigs (20/20, 220, 250, etc.) are also excellent. The Bearcat and early Uniden BC100 and 200 series handhelds were also good. The only "newer" scanners that are close are the Relm HS200 and MS200 from the 90s (which weren't really scanners as they were rebadged Yupiteru receivers...still awesome sensitivity).
Otherwise now you will have to use a commercial radio. A few hammy rigs come close. Your VX150 is one of them - an awesome radio. Good choice. Keep experimenting.
Otherwise now you will have to use a commercial radio. A few hammy rigs come close. Your VX150 is one of them - an awesome radio. Good choice. Keep experimenting.