Reef it is. I wanted to start out at the top of the rainbow! My very first tank in all. I went with 240gal. Island tank, plumbed myself all over one end...the tank is more or less a room divider, between my dining and family room. 3" to 4" sand bed with 250+lbs. of live rock, all types of corals: zo's, soft, SPS, LPS; also at this time 3 Tridacned clams, two linka stars, serpant star,various hermit crabs. FISH:2 Purple Tangs(Helga & Harry),2 Yellow Tangs(the Lemmonheads),2 Tomato Clowns(Ron & Roma),2 Manderin(Toad & Frog),1 Indian Mimic Tang(Fred, also called the Reef Ref. He is the refferee between the other Tangs... They get a little radical sometimes, so, Fred breaks everything up.)5 Green Chromis(Humphrey and the Bogarts). I also have three of the Aragrocrete sculptures form GARF.org(local to me)these are great and would recomend them to everybody!!! Reef is where it is at and all of its glory.