REEF-D, polyp extension is good.  The Blue Face and pygmies don't bother the sps.  Pygmy angels in my tank include the multicolor, flame, potters and cherub.
hceiv, I changed my bulbs once after 20 months.  Same combo, WHITE-BLUE-WHITE-WHITE-BLUE-WHITE-WHITE-BLUE-WHITE.
dvanacker, still SSB.
spykes, I've never really vacuumed my SSB.  I do have a few sand dollars that keep the sand fairly clean/white.  Some stringy worm-like critters in the LR come out to play on the sand as well, scavanging for food and leftovers.
Dan