Word processing on an iPad

Up until now I've used my iPad for entertainment purposes only. My laptop crashed and I'm going to be using my iPad2 as my main computer for awhile. What is the go to word processing app everyone uses. Also, is there a good keyboard you could recommend?

• Get the Logitech keyboard. Amazing at Costco for 79.99

• Use the Apple native PAGES

• PAGES from Apple, is excellent.

• Op microsoft office is free for the ipad

• itizzint!