i am currently testing 14/46 gearing.(comming from 15/46 wich seems just a tad bit too long for me).
brings the bike more to life.
too short for extended highway use though but perfect for everything else,say upto 100km/h it's still cruizing.
might go back to 15t front but try 48t rear.
just to give you some extra options before you place the order for a new sprocket set ;-)

mine has also 65000km.