Oh!!! Drannor, Menzo eh? Well I am planning on a small trip to Myth Drannor (the 1375 time line, current) where the elves have taken it back, and are now rebuilding it--this could be neat, as who knows what they will find, excavating the ruins.. lots of holes into deep underground areas maybe?
And I am planning on another massive Drow area/level set, but I dunno if I'd do Menzobarrenzan--since its so huge, but maybe cover a city near it. (menzobarrenzan was nearly destroyed by stonefire recently).
Now that I think of it, The only boxed sets I have are the same three you mentioned, plus the Forgotten Realms one, and the Skullport set--but IMO, that's officially Undermountain too.