Tong's is pretty expensive on corals, but no other retailer has corals like they do. Fish prices there are fair. Selection is huge. Staff are a bunch of jerks, maybe 2 of them are cool.
Reefer Madness is a great place in Torrance. Chris is really cool and he'll frag just about anything for you. If your into SPS his selection is awesome. LPS are good too. But call and make sure he's there.
Strictly Fish is pretty lame. Check out the fish before you buy him. Hopefully its new and hasn't had time to get sick. Coral pricing is outrageous. Don't be fooled by they're 1/3 off sale they have every now and then. Basically they mark it up 25% the day before and give you 33% of next day. So basically you save tax.
Jeff's is so-so. Some of the staff is good. Some corals are healthy some aren't. Prices are fair. Worth a look.
Pacific Reef in Torrance/Harbor City is HUGE. But basic common corals that are dying. Fish is ok, pricing is fair. But I like the staff.