stealthyOr the Tamron U.S. non-gray market equivalent with 6 year warranty is only $349 with $100 rebate and you can walk out of a camera store with it today. I almost joined this drop earlier, but ultimately went with the Tamron version and I'm absolutely in love with that lens. I'm so impressed with it that I want to try other Tamrons now.
http://www.ebay.com/itm/171939315466