Never owned Swaro's so I can't help you there but I'm familiar with Zeiss, I 've got one pair of they're Bino's and 3 of they're scopes. The bino's are almost 20 years old and still as clear as the day I bought them, I expect the same from the scopes. I'm sure Swaro's are as good or better.
If I could make a suggestion it would be to invest that money in a good spotting scope. The terrain we hunt here is pretty open and we spend allot of time glassing at long distance and the heat distortion on anything over 12 power makes viewing difficult, not sure of the area your hunting. For the kind of money you'll lay out for something in the 15 power range you could get a Damn nice pair of 10X42's in either Swaro or Zeiss and still have plenty left for a fine spotting scope. With that said, if I could afford the 15's I'd buy them.