I would love to make some recommendation for you, but until you decide what you want to run, it is difficult to say. I run 2 meter/440 and 2 meter APRS in my Colorado . I run HF, 6, 2, and 440, plus APRS in my Blazer. Each one presents different challenges with power and antenna selection / mounting.
If you are starting with 2m/440 then there is not much to it Make sure you have a good (short lead) ground at the base of the radio and if possible also a the base of the antenna. While wiring direct to the battery is a good idea, I seldom find it necessary on 2 meters with only a 50 or 75 watt transmitter. The center of the roof is alway a good choice for a 2 m/440 antenna. Mine barely rubs the garage door at home and only drags in one place overhead in the local casino garage. If I was not a Z71 I would not hit in either location.
Any of the popular brand mobiles will work. Just choose one based on features and price. I use Icom 2m/440 and Yaesu hand helds and HF.
Good luck
N9KB