Well I have done a bit of research into both the lenses I want from both Canon and Sigma but I would like peoples thoughts from here about them as there is a pretty big price difference between the two brands. My choice of the 24-70mm is for general shooting and the 70-200mm is for motorsport and sports shooting.
The lenses that I'm looking at getting are the following:
EF 24-70mm f/2.8 L USM
EF 70-200mm f/2.8 L USM
24-70mm F2.8 EX DG HSM
APO 70-200mm F2.8 EX DG OS HSM
All thoughts would be great, and if you think another lens might be a better option specially for the shooting of motorsport/sport please let me know!