For this install, I wanted some lower-profile antennas to accomodate low-clearance places like parking garages. This gives me 7-1/2' of clearance, which is sufficient for most of them. These are plain Larsen 1/4 wave whips for 2 m and 70 cm and a collinear whip for 900 MHz. They all work great. I was surprised just how well a 6" whip can work on 70 cm. The antennas are barely visible in this image; scroll down for a close-up.
Nothing beats NMO-type, through-hole antenna mounts. There's a reason public safety vehicles use them and the hole will not ruin your car. Use the right hole saw drill bit and you can't go wrong. I normally do my own installs but this vehicle has a rather complicated headliner so for the antennas, I went to APW Electronics when I was living in Austin, TX. John did a terrific job, including routing the power cable from the battery to under the driver's seat where I mounted the Kenwood.
The Kenwood TM-D710G is the best V/UHF mobile radio I've been fortunate enough to own. Features like dual-band capability, alpha-numeric memories, and cross-band repeat are enough to make this a great radio. It really shows its value with the built-in APRS system. It comes in handy when I'm traveling and I can see information on repeaters in the area.
I also keep a 900 MHz Motorola Spectra in the vehicle. 900 is a great band, we just need more people on it!