I'm purchasing a new camera in a few days. I would really like to learn photography but I am a university student majoring in Nursing. That being said, I would like to know if there are major differences between a 8mega-pixel DSLR and a 10.2mp DSLR. Should I just make the sacrifice (alot more than I am making now) and buy the 10.2 Mp cam or is a 8 mp cam good enough for me.