Affordable and sturdy, if not particularly light: Manfrotto 055B Pro full size aluminum tripod, plus Manfrotto 410 geared head (nice for macro and architecture and landscape, not for action), plus Hejnarphotostore Arca-Swiss conversion kit for the Manfrotto 410. Approximately 7 pounds in all, not really an issue if your outdoor photography doesn't involve long hikes or much elevation. The aluminum leg set can be prone to vibration in wind, particularly if using a long (400mm) lens. But - you can't kill the old-style Manfrotto gear - you could safely buy the legs and head used.
I don't know much about used Manfrotto ball heads. Large diameter ball is better.