car antenna

Hi all, Looking for suggestions on car roof-mounted antennas that are all-band for an SDS200. Preferably a stubby antenna, or anything that is not absurdly long. No budget considerations to be aware of, as I'm looking to explore options. TIA!

Does anyone know what these antennas are on the BHPD CVPIs? I have a feeling they're made by PCTEL, but I'm not sure. If someone could let me know, that would be much appreciated. Reference video -

Does anyone know what those 2 big pucks are on the top of most of the explorers and some crown victorias? I suspect that they're PCTEL Trooper antennas or Motorola AN000163A01s but I'm unsure. If someone could please let me know, thank you.

Ok i have looked at tons of antennas and i am confused on a few different things for example a dual band and a tri band antenna if the tri band lets you cover more why would people even bother with a dual band is it because that if a antenna is programmed for a specific freqs it will pick up...