For the rare times when a serrated blade might be the better choice over a straight blade, I'm thinking something like this (inexpensive) fully serrated knife might be the ticket:

http://www.amazon.com/Spyderco-Meadowlar...=I213ERVKSPJJAT

Or it's bigger brother (if your state allows "concealed carry" of a knife with a 4" blade):

http://www.amazon.com/Spyderco-Cara2-Rescue-Black-SpyderEdge/dp/B001EBXH04/ref=reg_hu-rd_add_1_dp