That Cobra 18 WX ST II scans all channels, too, but the Dual Watch feature is different in that it constantly scans only two channels of your choosing. If you search ebay for "cobra 18 cb" you will find some very cheap deals from time to time. Just make sure it is the WX ST II to get the best features as there are older versions lacking some features.
If you do not have a weather radio feature on your truck stereo like most semis do, that feature is worth the cost of the radio in itself, imo. You can also hook up a PA speaker and yell at your kids or wolf whistle at chicks... :-laf
For me, the simplicity (idiot-proof), compactness, and front-firing speaker and microphone jack are great features, too. I am going to see if i can mount one in my Dodge where the cup launcher currently is. Right now, the one in my pickup (I have 3 of these radios) is mounted to the bottom of the overhead console doo-hickey.