After a few more stops around the interwebz and another phone call to Kingston I decided to go with the amazonian version. KHX1600C9D3K2/4GETR and KHX1600C9D3/2G are the exacft same part.
The K2 is merely saying that it's sold as a 2 piece kit, the 4G states that the kit contains a total of 4GB RAM, and the ETR merely explains that it is only available through online agencies.
Thanks for all who helped explain that Dual Channel is MoBo related and has nothing to do with RAM until you go to place it into the actual MoBo. Since I will be filling all 4 slots with the exact same RAM; Windows7, my MoBo, and my CPU should all be happy.