Hi, I'm looking for much needed advice on double or tandem buggies. I have a one year old and I'm expecting number two in January. So I'll need a buggie that can fit both newborn baby and toddler (who'll be one and a half). I live in Rome where the flats are very small and the main doors very narrow( have already given up on trying to fit it through the door lifts, life will be hard hmm). Can anyone give me some precious advise on this future and predictably very expensive purchase? Thanks very much.