After using Eclipse for C++ (CDT) off and on for a while now. I've come to the conclusion that when set up properly there's no better C++ tagging system (F3 Open Declaration) and auto-complete in any IDE except perhaps Visual Studio. It works so well that people like myself who dislike Java still use it on C++ projects out of the sheer advantage it gives you when browsing through a code base. I don't know what they've been up to there on the CDT project, but they sure have managed to get it right.