I'm using a Yaesu VX-150 (also know as a Vertex). It's a ham radio, but it recieves 140-174, which well and covers the railroad band and well as the marine band (my two major hobbies now, trains and ships). There was a big discusion on another board I'm on and people swore by it. I love it, it's small, has a decent rechargabe battery standard, was only $119, and I'm planning on getting my Ham licence at some point. With the stock antenna it does well, but I have a 'tuned' antenna on the roof of my truck, and it works great. Also have the PC programing cables, which are nice, but they didn't work when I first got it (bad batch of cables, sent it back and got a news one.. no problem), so I hand programmed all the AAR's in since I was going on a trip the next day, and it wasn't that bad to hand program. Also, it has an 8 character alpha display for labeling the channels.
There are a few drawbacks though, it's a slow scanner. Only 8 channels a second. Not a big deal since I block out all of the 200 channels execpt the ones that I want to listen to at that time. Some people seem to mind the SMA antenna connection and would rather have a BNC connection. To me.. the SMA is fine, though you need to be careful about the antenna you buy. I don't see peoples objections as it's just a couple of turns, and I change the antenna all the time. I've never been in the need to change it in 1/2 a second as opposed to 2 seconds.
I love it, and it was worth the money. It beats a scanner on the same band hands down for respection, it's strong, not to heavy, and a good size.