I agree with both death and storm, i'm thinking of getting a 60d just for video and the faster burst speed, my 400d is fine, especially with my nice 50mm 1.4, 24-70mm l lens, and a 24-300mm supertele, i get some seriously sharp shots, with fast focus, on an outdated, bottom of the range camera

Only problem is that it does't do video which sucks... also would prefer phase detection so it focuses faster, so i would recommend the 600d.