i used sand for a while and loved it. The sand can look dirty sometimes but it doesn't take much to bring *all* of the waste off of the surface of the sand to make it look good again. Spin something around in the aquarium and the waste will float for a second, then suck it up with a syphon system or let your filter take care of it.
I remember seeing a modification to the python system that would let you syphon a sand bed while sucking up detritus without bringing up any sand. This was almost two years ago, I wouldn't even know where to begin to look to find it for you.
my fish loved the sand, especially my corys.
and with an emperor400 I would lose sand over time... had to replenish it every 6 months or so. It can also hurt impellers on some of the systems over time but not enough to matter a whole lot.
I just used playsand i picked up from walmart, used it for more than a year before going to flourite.