depends on your budget. If you can afford the 5D3, wait until the 5D4 is available. 6D will do well in low light, If you're talking about indoor sports, though, I'd go with the 5D.
BOXERDOGNAZ wrote:
I use a Canon 7D at the moment but would like to take more landscapes and low light shots (indoor and out). Lenses I have are 50mm 1.4 , 100mm2.8 , 16-35mmF4L , 24-105L , 70-200MMF2.8 L and 400mmF5.6L. Would like to upgrade to full frame , which would you choose 5D3 or 6D.