I also switched to cellulose in my DE filter. I think it makes the water sparkle even more than the DE. It's safer and biodegradable. On the down side, it does cost a little more to use and it seems to not backwash quite as easily, so I have to do a breakdown cleaning more often.
But, if you want to become a snob about how the water sparkles and how clear you can get it, give it a try.