Ok, here's another confusing post. Unless you are going to build a house go with the 711, paired with a smaller blade (311 or something comparable). THEN get a third, either the Wardog or and S5 for a medium size blade.

These three will give you the ability do "Do it all" in a survival situation. You could piggyback the 711 and 311 and keep the S5/Wardog (or similar size blade) ON YOU PERSON AT ALL TIMES, along with your DIAMOND sharperner).