Handlebars come in many different shapes and colors that will fit the S3. LSL makes some that I've seen and like and Tag, and Renthal(they have gold). Need 7/8 inch bars, I've heard that if you go bigger then 760mm in length you may have problems with cables not reaching.
This is a nice example to work from:
http://www.spieglerusa.com/cfm/handlebars.cfm
It gives you sizes and pictures of bends.