Advice on cb radio and antenna height/mounting position

[seanshreds]

I am getting a cb soon, I was thinking the cobra 19 dx because it is small and basic. Can I get some feedback? Is this a good radio for its fair price? Also I was wondering what a good antenna would be? I was thinking a 4 foot firestik II that would be mounted on the back behind my left tail light. Is this a good size/place? Any advice or recommendations regarding anything cb is much appreciated.