I wouldn't order a coral that expensive online. It's super easy to doctor photos, you are quite likely to get a less spectacular piece that has been saturated to bring out the yellows. I'd rather find one in the LFS. Expensive corals usually sit around for a few months before selling in a store, so you won't need to be too vigilant in waiting for one to come in. If you must order online, Cornbred and Queen City Corals seem to have the legit lineages. Of course, keep in mind that yellow corals are prone to go green in certain tanks. I would just stick to a basic $200 yellow torch for a while, save some money and make sure that yellow shows in your system. Also, I'd recommend not buying a name. Get the coral that looks best to you, and don't worry about whether or not it's "genuine". Good luck with whatever you end up doing!