If you want the "most" receiver you can carry, check the Yaesu VR-500. Not cheap at $250usd. The size of a pack of cigarets(forgot how to spell it,, advertising must be wearing off) it covers about .6mhz to 1.3ghz (in US cell and a few other frequencies blocked). Not blocked in rest of the world. Modes are AM Narrow AM, FM, WideFM, USB & LSB. Over 1000 alpha/numeric memories with computer linked database available (free software, you make cable or buy for $30usd.)
It has its drawbacks (limited RF attenuation, small speaker) but I find it very useful. It allows me to monitor all useful frequencies TVaudio, Public Service, AM/FM aircraft military and everything else but cell phones. Do a search on Yeasu VR-500 for more info, or there is a very informative yahoo group you should check before you buy. As a ham for over 30 years, I can't believe they crammed so much stuff in such a small package.
Contact me directly if you want more info.
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...........From Nomad.........Been "on the road" since '97