Here's the new list, averaging around 4.5 days/city.
London
Manchester
Edinburgh
Dublin
Paris
Marseilles
Brussels
Cologne
Amsterdam
Hamburg
Copenhagen/Malmo
Berlin
Prague
Budapest
Vienna
Venice
Rome
Milan
Zurich/Bern/Geneva (which Swiss city should we go to?)
Munich
Luxembourg
Things might change a bit, but this is generally the plan.
I'm so unbelievably stoked for this, only a month left!