My travelling is T-1204X (0.8kg) + Manfrotto 496RC2 (0.42kg, max load 6kg) which is 1.22kg total weight. I have a friend, his full sirui setup T-1204X (0.8kg) + K-20X (0.4kg, max load 25kg) which is 1.20kg total weight. It really depends on your needs if max load is a factor. T-1204X (0.8kg) + G10 (0.3kg, max load 18kg) => total weight 1.1kg. I guess the lightest setup is around 1.1-1.3kg AFAIK.