I like Dennis Prager, but I think Kurt Schlicter would be an ideal replacement for Rush. He’s funny, smart, witty, and VERY conservative. Mark Steyn is also a good candidate.
Hugh Hewitt puts out an excellent, top notch product 3 hrs a day. Not boring, one problem though, he calls himself a Romney Republican and throws feminine hissy fits at times relating to that. On the whole very good, very informative.