I am a beginner in photography but I strongly believe I have good passion in photography. Now I am using a Sony cybershot w220. I am trying to sell some of my works on sites like dreamstime, fotolia, iStockphoto etc. So I need a better camera for making perfect pictures for this purpose. I am looking to buy a new DSLR Camera. Which DSLR should I choose for my needs? I need an expert answer.