If you ever are in the Orange area, there are several that I've frequented.
New Wave (on Tustin Ave.)- my favorite, but the store is small but everything is always so healthy and the owners are very nice.
Ocean Blue- Brian the owner is pretty cool. He has brought in more coral than he's had in the past.
Jeff's Exotic- pretty good, nice coral selection in the back. They frequently have 25% or 50% off sales in the coral room.
Pacific Reef- new to Orange, but seems to have pretty nice peices. The employees aren't very knowledgable if you asked me.
-Others-
Tustin- Puppies & Guppies- Small but the staff is knowledgable.
FV- Tong's- The store and selection is incredible, but I've had nothing but bad luck with the livestock and corals I have purchased there. I've read some pretty bad reviews on the place from fellow reefers, but I don't quite remember the specifics.
Costa Mesa- San Bar Pets- Small store, but friendly / knowledgable staff from what I've found.
Bean