The SWFA binos are a known quantity. The Kenko model has been around for a long time and is generally well regarded for its price. It has dielectric coatings but no ED glass. I've thought about picking up a pair of the Kenkos for a while, but I've got kids and don't want something without good warranty service. I'd gladly buy these from SWFA, but for what they are I think $300 is kind of expensive. There are lots of models in that price range that look better at least on paper.