Thanks Munin.
Specifics, good idea but hard to supply. I expect to have 3-6 players who vary from hack n slashers to good roleplayers, so some will want good intrigue & investigation, others will be happy to just sit back & wait for the fighting to start.
Because we're a long time between sessions, I'm hoping for short(ish) adventure that can be played in one or two sessions, preferably L12+.
City vs dungeon vs wilderness isn't important as long as theres an interesting story to the adventure.
Hope that helps.