Lemme think...."cscdesert" is a pretty good one, it has a town for citizens and some bunkers for the Combine. But do I really need to describe it? EVERYONE knows Cscdesert. It's a classic.White Forest comes to mind, there are plenty of maps about it.
I'm sticking with what I suggested before, md_whiteforest or md_whiteforest_radiostation.Both maps are pretty much perfect for the outlands, whiteforest probably more so if we're not going with one main group.
I've already linked them to you before, the prefix/suffix of both are probably wrong in what I said, though.
Which is the coast map with the bridge in the middle, if that's one of the ones in the poll I may have to change my vote..