Hey guys I'm thinking of upgrading from my 600D. I've got a budget of $1500, so im stuck on either a 5D Mrk ii or a 7D. I'm not sure if its worth the extra doh going for the full frame or to get the 600D - I shoot motorsport and and lots of cars and landscapes so I'm thinking that the better focus of the 7D will be more valuable to me in the sense of quick and accurate focusing at the track. I think the 600D and the 5D Mrk ii have the same 9 point focus and single cross point autofocus compared to the 7D's 19point?