Apologies Osbo. Guys, I think you can all do as many calculations as you like the fact of the matter is your working very hard to find small details especially you Osbo. I'm sure your figures are very accurate but surely you can agree that when spending half a billion on new equipment the advantages should be as clear as day! Even after all your hard work thats far from the truth so the question remains why? The only answer I seem to arrive at is snobbery.
Plus all this rubbish about reliability, the fact is these props are used pretty rigorously on all sorts of routes, often on short sectors and after a few years they are going to need a bit of tlc. Sure the 175's will to although I don't think they are going to be such a success.