I saw the longer the better, but not everyone can get away with running a 102" whip.

Do you park in a garage or covered parking? See how much room you have to work with between say the top of your taillight and the lowest point in the parking area. That will give you a rough idea how tall of an antenna you can get away with. I said taillight, figuring you will likely use a taillight mount as it is pretty common.

Firestick 2 with adjustable tips are pretty common and decent antennas.