I have a 5DMkIII but can't beat my 7D for night sports and action. Many friends I know like me would jump at a 7D MkII with better noise control at high ISO. The 1.6 factor makes our 70-200 a f2.8 112-320 super zoom and Sigma 120-300 a powerful and fast f2.8 192-480 . Dark high school stadiums, gyms, theaters, and other outdoor action benefit from crop for fast zoom, high iso. Quiet mode from 5DmkIII is great, hope that they include it in the 7DMkII and keep the CF card.