Leawoodcops:
Just for my own curiosity, are you not part of a Citizens Patrol in the Houston area? That said, am I not correct in assuming that you want a small inconspicuous radio AND antenna so as not to draw attention to yourselves while you are in your assigned patrol areas? Your communications needs are not so much for distance between cities but relatively close neighborhoods...safe assumption?
So! While there is no comparison in the performance of an antenna with a significant loading coil and 4 ft plus rod, since your needs appear to be of a much more localized rather than a wide area or distant broadcast coverage AND since there appears to be a concern for STEALTH, I still stand by the discretional looks of the Cobra or similar look alike that you queried in your original question...just not through the glass...needs to be a hard line antenna to radio...
unless my assumptions are in error...
While the GMRS/FRS type of handhelds are even more discrete, their range (due to spectrum, antenna length, and wattage (or lack thereof) in our experience in both city and rural locales is limited to 2 miles or less. The exterior mounted cell look-alike or very thin short rods "hear and talk" better.
Good luck...be safe.
Just my $0.02...FWIW ($0.02).