Another alternative is a pair of SDR dongles, Unitrunker and DSDPlus. They aren't as easy to set up as a "punch in your zip code" scanner like the 436, but with time and patience, you can set up your own homebrew digital "scanner" for about $40 + your own computer. If you're interested, start reading up on them over in the SDR forum. I've used such a set up to monitor the RWC and once I got it dialed in, it worked damn near as well as my $500 436HP does.
-AZ