I am a of rabbet and dado joints. They will line everything up for you.
I would also say it depends a lot on the type of wood you are gluing. Every wood holds glue differently and in each circumstance the strength of a butt joint will differ. I had an old box made from MDF using only glue, rabbet and dado joints. When it had served me well I decide to give it the old sledge-O-matic treatment and the joints never gave, the box did have a lot of 6" holes in it though.