Hello. Until now I was never with binoculars more than 600 euros worth. But my vanguard binoculars are almost ruined and I am getting more demanding as a birdwatcher so I am going for new binoculars and after a lot of research I am now between the Zeiss SFL 10 x 40 and the Swarovski EL 10x42 WB. But it has got impossible for me to decide which is the better choice of the two so I am desperate for advice! Please!