Hello Ive been researching digital slr's and im having trouble deciding which camera to buy based on what i wanna shoot which is wakeboarding and wakeskating. This is a fast sport (20+mph) so i wanted to know which camera i should buy that would be no more than $2000 including a lens that would do the job. I was considering the nikon d300 or the canon 40d. Any suggestions on what digital camera would be good for this sport. Thanks