Examples of conditions - outdoor in the evening, under limited lightings from lamppost or other light sources. Or in a restaurant/house taking pictures of food, people in nice ambient light. Not dark like I can't even make ot the faces. Can see faces clearly, but not very bright, with slight movements but not like playing sports kinda movement.
I don't really like to use flash, totally destroys the pictures IMO (unless it is a studio shoot). I tried adjusting aperture using AP, but of course the camera automatically adjusts the shutter speed too. I have experimented with adjusting aperture and shutter to allow more light and increasing ISO. Picture (and lighting) looks ok but blur, due to myself - not stable enough. Then I see some other photographers next to me, snapping away without flash with a DSLR (higher model, different brands). Of course I am assuming their pictures will turn out fine. Hence I research and come to the conclusion that my equiments are not fast enough. Please correct me if I am wrong.
Budget wise I can stretch a bit to accomodate the body. I have already sold my 400D with kit lens.
Question : To start off here, is it better to get a lower range camera (eg Canon 550D or Nikon D90) and a better (faster) lens, or a better camera with kit lens (Canon 50D, 7D, 5D or Nikon D300s,etc)? I am open to 2nd hand gear and of course will upgrade the lens a step at a time while working on my skills which is just as, if not more important than the gear.