I upgraded to the 6D from the 7D. I wanted the fantastic low light performance and didn't have over $3000. I was very happy with the 7D, but I've been shooting mostly in light challenged situations. I wish I could have kept both. I use a battery grip and can shoot all day with 2 cheap Chinese batteries and gps. If you shoot wifi and gps, you will kill the batteries fast. If you need to be stealthy, take off the grip and put a shorty forty on it and it looks like a rebel. That center point is amazing, but in really low light, all of the other points are useless. It makes composition difficult in low light sometimes. I'll shoot wide and crop in LR in these situations. Get a 5DIII if you need better AF. None of my 3rd party batteries charge in the 6D OEM charger. I bought 2 cheap charger on eBay and they charge fine. When you put 3rd party batteries in the 6D, you get a "Communication Irregularity" error. Just select the "OK" option and the camera will work fine. You just won't get a charge level indicator. I'm very happy with the images and the 6D in general. If you get one, buy the kit. You will get the 24-105 for like half price and can always sell it for a hefty profit. $2000 is a lot, so rent one if you are on the fence.