openGL laptop

Does anybody own a laptop that is not heavier than 5lbs and that has a good videocard (at least ATI 9000 32MB) and very good performances?
Can you please share here your experiences with such a machine? Any suggestions?
I am looking for a serious laptop that can be used for openGL and computer graphic C++ programming.

[This message has been edited by franz1999 (edited 05-03-2003).]