i am 16 and i am seriously thinking of becoming a photographer as a career, but i don't have a very good camera. i want to upgrade from my KODAK Z612. i think that the Nikon d40 is my best met since i am on a budget. i have looked this up and some sites say that the 10MP of the 40x is much better and worth the extra $200, and some say that megapixels dont mean jack. please help i am so confused...