Honestly you can use whatever you want for a body. The less dense, the more dings it gets and "maybe" the screw holding wouldn't be so hot on say Balsa Wood. A neck wood you have to be a bit more finicky with. Rosewood isn't as dense as ebony or maple and it is pretty popular. Rosewood is also an open grained wood. I wouldn't discount your fretboard wood just because it is open grained.