I don't like turbos because they are unable to right themselves which makes them easy pickins for the crabs. I really like astrea snails (I've got one that's as big as a turbo), ceriths are good, Nassarius are good at turning up the sand bed, I like to have a lot of blue leg hermits, there great at cleaning detritus and rock work, and I've also got several emeralds. There are a lot of options out there just make sure and do your homework, if your running a reef make sure they are coral friendly.