I had been reading a lot of threads concerning what kind of wood should be used on guitars. A lot of folks chimed in and made suggestions based on their personal experience and taste. I am trying to find out exactly what kind of characteristics and properties of a certain kind of wood that have people make them the material of choice. I don't doubt people's experience about their guitars, it is properly true for them, but I'd like to get some facts about the woods like alder, poplar and agathis, not suggestions. Does any body have any info on these woods or knows where to get info about them?