i want to put a uhf radio in my car for shits and giggles

i mostly drive around the city and down south in metro areas and thought a scanner would be of the most use but after doing some reading on http://scanaustralia.com.au/ i think i might have some fun with a two way cb.
so the question i'm stuck with is should i get a dedicated scanner like the uniden UBCT8 or a combo scanner/cb like the uniden UH015SX?
by getting the combo, what features am i missing out on compared to a dedicated scanner?
in your experience which is going to be more fun/useful for a recreational user in a car?
oh i should add, i want to listen to emergency services, truckies, cabies, other amateur cb users if makes any difference
thanks in advance

