Scanning antenna
Depends what you want as discussed many times over in this forum. For me its the Radioshack Mag Mount and an AT-256. This combo gets me all the VHF/UHF and 800-900 systems I monitor. OBTW I have tried the 20-176, and the other 73 dollar discone from RS. My current combo is a "get ir dun" setup.
Pro-2051/BCT-15/PSR-500