Besides CB radio and the low-power FRS handhelds
that are so common today, there are also
very cool and flexible radios in Amateur Radio
i.e. Ham Radio. I have an Amateur Radio license
(very easy and free to get) and the H3 looks
great with nice dual-band antennas on top.
Lots of mounting room up there on the roof.
See for yourself:
There are lots of cool-looking 50-watt mobile transceivers to choose from,
and mountaintop repeaters and GPS beaconing and voice Internet linking and such to play with.
More links:
http://www.yaesu.com/
http://www.hamradio.com/kx2005.html
http://www.pbase.com/hummer2005a/ (more of my pics)
http://www.irlp.net/
http://www.arrl.org/hamradio.html
Good for those with at least some interest
in RF engineering and transmitter details, anyway.