I run a Uniden 78 and have found it to be a very good radio.
As far as the suuggestions about the Cobra radios, stay away from the ones with the Soundtracker Feature. I had one (well 3 actually if you count the times I returned the 1st one I bought) and I could not recieve more than 1/4 of a mile regardless of how I set the controls. Finally got fed up and tossed it in the trash and bought the Uniden and my range went to several miles.
Anyway as far as antennas go, if you are driving a truck like a Volvo, some of the Century Class Freightliners, and a few others that are all fiberglass and the mirror supports are plastic coated go with a Wilson No ground antenna if you need to buy one.
http://www.wilsonantenna.com/ngk.htm
If you have metal mirror mounts then I suggest a Wilson 2000.