Min - I had several Turbos in my tank. They did good work, but they do knock stuff over if it isn't secured well.
I also like my LS urchin, however, he's curretnly on the watch list because he ate a snail, and he has eaten 1/2" growth off one coral, and 2 other growth tips on another coral. I wish he would spend more time on the turf algae. grrrrr