We're currently playing through Princes of the Apocalypse. Would Mike's version of the Sword Coast be the best map to get for that campaign?
Edit: I should say that my plan is to get a copy printed out to put up on the wall next to the game table on game night.
As a decoration, it's excellent; I have it on my wall as well (though only 11*17, as that's the largest my print shop handles). As a game reference for PotA, it's like using a map of the Western Europe to get information on an area that's about half the size of Ireland.
This is the only high-res map of Khorvaire I could find.
http://archive.wizards.com/default.asp?x=dnd/ebwe/20041206a
How is it with wet/dry erase markers?