I am finally making the switch to full frame. I have read reviews and would like real world experiences. Is there any reason I shouldn't get the 6d instead of the 5d3? 90% of the clicks will be real estate with the occasional kid shots and maybe some family shots. Is the auto focus the only major difference? Shooting real estate wouldn't require that to be a deal breaker. The only lens I currently have that will fit is the 50 1.8 so I will be making the investment in new glass as well. I believe the Tamron 17-35 and Canon 24-105 will work for what I do. B&H and Best Buy both have the 6D with 24-105 for $1,999 and the 5D3 with 24-105 for $3,099. I'm just not sure the extra $1,000 would be beneficial.