Library for making charts

For a new project I need a library for making charts. Boss says: "no flash", so products like Open Flash Chart can not be used. Google Visualization API is also not possible. So my choices seem to be the following:

• Clientside GChart seems to have stopped development for more than a year.
• gflot is - well - too much "plot"-like for what I need.
• GWT Highcharts is probably ok for my purpose and looks as if it was relatively easy to use. Good, since I don't want to spent three days digging into a charts api. http://www.moxiegroup.com/moxieapps/gwt-highcharts/
• ExtGWT is based on flash
• Arcadiacharts seems to be ok for my purpose too. The charts look good and it also seems to be relatively easy to use. http://www.arcadiacharts.com/demos

I will try GWT Highcharts and Arcadiacharts and share my experience with you soon.