There are rebates currently available for numerous Tamron lenses. Additionally, you can get 4% rewards on all of these lenses from B&H. These deals end July 31, 2014. Check them all out while they last here at B&H Photo.
Amazon currently has the Olympus OM-D E-M5 available for $614.95 (reg. $999). Check it out while it lasts here on Amazon.com.