I am the grandfather of year-old twin boys who don't sit still and a 3-year-old. I have a Canon 60D and get excellent results. Autofocus is great. Grain is minimal, even going up to 6400 ISO. Heck. I've got to 12,800 and it isn't that bad. Shot some high school basketball for the newspaper I work for. Not normally on the photographic end. But I will say, keeping the shutter speed at 500th by adjusting ISO and aperture has made every picture I have taken come out sharp and in focus. Now maybe each picture wasn't framed perfectly, but that was my fault. Sometimes I would daydream and suddenly notice a good picture was coming at me. I would hoist camera to my face and shoot and if lucky had good results. Like I said, minimal grain and sharp every time. You are not a professional photographer. It isn't your livelihood. Maybe you have money to burn. But I wonder if you just need to hone your skills rather than looking for the answer with dollar bills. I've had other cameras but the 60D is by far the best. Maybe you should work with it a bit more before you spend thousands and get pretty much the same results.