I shoot with a Nikon D300s and the quality I get out of it straight out of the camera speaks for itself. I rarely have to do any post processing. If I do it is mainly just for fun. 8 frames/second with no lag whatsoever (I can shoot up to 100 photos this way while holding down the shutter and it doesn't miss a beat, reclick shutter again and it will go for another 100 shots if I wanted), sharp and clear ISO capabilities up to 1600, grain only begins to show after that point. Great image stability, water resistant which is great for dewy mornings, and very durable. You wouldn't believe what I've put my camera through and it still is working like the first day I bought it.
I will tell you though that just because you get an expensive camera does not mean you will get great shots. It is the photographer that makes the camera not the other way around. One of my best photos taken to this day were taken with a cheap point and shoot. Has won multiple awards, my best seller, and has even recieved photo of the year in an international contest.