Hopefully in the next few to several months I'll get to do an upgrade and i've been debating this very thing. I've always had sand, like the look, but get tired of seeing it fly around the tank when the fish kick it up.
For those that have taken it out, I've heard that rocks will shed for awhile until its all gone? Doesnt the bottom glass get full of green algae since its not being scraped off like the side panels every few days?