Regarding the sticker shock on the Uniden scanner. The Radio Shack Pro-106 digital trunk tracking scanner is roughly equivalent to the Uniden and can be purchased during periodic sales for $299. Still not cheap, but a bit better. An impartial review is
here. Note the eBay auctions at the bottom. An older Pro-106 may actually be preferable to a new one which locks out the national 700MHz tactical frequencies.
ETA: I checked my Uniden and it trunks the 380 to 400 range used by the U.S. military (unencrypted only of course) as well as the 799 range tactical frequency. YMMV with newer units. Uniden review
here.