Well, if you don't want the small stuff which isn't necessary but nice, you could go with about 6 turbo snails or trochus snails. They are both relatively long-lived and clean algae very well. The trochus snails cost a little more but are not as clutsy when it comes to knocking over corals. DSB will do well with some fighting conch and Nassarius snails. I would probably add about 50-75 small Nassarius or 25 large Nassarius snails. Maybe 2-3 fighting conch and a small cucumber or two would be a good start.
The good thing about kits from the two companies above is that many of the snails and worms reproduce and free detritivores that reproduce continually is a good thing
I like
www.reeftopia.com and
www.premiumaquatics.com for most of these cleanup crews. Main thing is don't overstock with cleaners as they will just starve to death if not sustained.