I had a Nikon D50 that I really liked. I ended up getting the Tamron 28-75 f2.8, and got good results. I used it about 4 or 5 years, until I got a D700, and the 70-200 lens. The funny thing is, I can get as good or better results with the old D50 in bright light. There is no contest with poor light (D700 hands down), but I over expose in good light with the 700. I have a lot more homework before I get good with the 700, but I know I will get there. The point of this is that a better camera does not automatically make you a better photographer. The only thing that can do that is trial and error, and learning from your mistakes.