If I wanted a bomb proof bottom bracket for touring in parts unknown, I would get the SKF bearing bottom bracket square taper. It comes with a 10 year warranty. Its a cartridge type, so no fuss.

My experience with external BB has been dismal at best. I used a GXP BB on my daily commuter and the bearings last about a year if I am lucky and I even faced the BB shell. With that said, you can't beat the simplicity of installing or removing of this style of BB and the weight differences makes it worth while. Maybe the Chris King external bearings are better?