Use a light wood, I suppose. Unless it'll be hollow. Cause it would weigh pretty hefty solo. I would use metal, but that's a personal opinion.
Once I am complete with my Sangheili costume, I plan on painting the BS with a nice color scheme so it goes with my ODST (already have an energy sword for the big guy), so they can be a cool duo at the upcoming convention.
Oh, awesome!!! That sounds crazy awesome, dude! I was thinking of using metal for the blade part... but I dunno, I'll have to see what I can work with. I've got idea's of what to do going in my mind right now, so I'll see what happens tomorrow!