I don't have any experience with the Pen knife, though it has been on my wish list for a while now, but I can tell you I am one of the loudest supporters of the AK bowie. I have had mine for about a year and a half now and it is my standard camping knife/tool. It's pretty much indestructible and does multi-duty as a chopper/hatchet, knife, and pry bar. It's fairly heavy, which is great for chopping, but I find it still graceful enough to use as a fishing knife and for making fuzzy sticks. I've done everything with it from making dinner in the kitchen to chopping down small trees to build a shelter and it has never even slowed down. I definately heart my AK bowie. Also I've always wanted to try out one of those munk chunk cleavers that were coming through for a while, are there anymore of those on the way, Yangdu? Cheers!