B&H has the Sigma 17-50mm f/2.8 EX DC OS HSM lens for $544 (reg. $669) through March 17. It’s available in Canon, Nikon, Pentax, Sony and Sigma mounts for APS-C format cameras. Check it out here at B&H Photo.
B&H has the Canon 6D for $1,999 (reg. $2,099) and the Canon 6D kit with EF 24-105mm f/4L IS zoom lens for $2,499 (reg. $2,899). Both Canon 6D options include a Lowepro camera bag and a Transcend 32GB SDHC card. Check them out at the links below.