Bing and Google both have their perks.
Say for an example, you need to research a topic on Cells. I would use Bing for that because the search engine Bing really find stuff you need. It will tell you and give you links that will help you lots. Plus, it looks freakin awsome.
But if you were looking up news about President Obama, you might want to use Google because It looks for every single webpage that involves the word "Obama". Both are great, and I personally like bing most. but i do use both depending on what i need to know.