I'm not a fan of Mark Levin, he's in the same vein as Rush Limbaugh. A kind of real life forum troll.
My problem with social conservatives is that they brand themselves as defenders of freedom when social/religious conservatism is generally incompatible with that goal (as we saw during the Bush years).
You might want to check out Ron Paul's newer books if you haven't already. He's a constitutionalist/libertarian, but not a social conservative. I found his work to be very interesting and it gave my some new perspectives. Ron Paul's brand of republicanism is a bit too libertarian for my tastes, but I think social liberalism/fiscal conservatism is the general direction the republican party needs to go to be competitive again.