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Whatever you do, check with Doug at www.cameralandny.com as he usually has the best prices. He's a sponsor.
I have the Leica, and I love it. The Swarovski is supposedly a better unit, and the only complaint I've heard about it is the rather large 'reticle' or circle that indicates where you are ranging. The Leica one is a very small box, and easier to aim.
I wouldn't trade my Leica for anything though - to me, it's more than enough, and I can't justify the extra hundreds on a Swaro.