I believe I still have a five-gallon bucket of soybeans and a five-gallon bucket of lentils out in my toolshed. A friend give them to us when she moved away. She had gotten them from her in-laws who had bought them during the Y2K scare. I've tried both. They suck.

I'm sure dried beans would be a top choice as survival food (assuming you have fuel for cooking), but buy varieties you actually like.