...not bombproof, just waranteed 05/06 Karmas for delam tail pretty much split in half and had about 6 cracked edges after about 30 days on them. Great ski but not bombproof.
K2s do not break easily, the PE especially, they are a solid ski and have a much better price than the karmas. they are both solid skis, i say go with the PEs, save some money, and go skiing with that extra cash.