I dunno ..ask them their adress for their office and a few questions about their return policy and stuff and check that it matches up with the info on their website. OR if you know anyone who who lives in Orange CA get em to check the address out.
Edit: just found this link.. http://www.highdefforum.com/showthread.php?p=413778
FROM ANOTHER FORUM:
Ok I drove by their listed "main address" this afternoon. The only thing there are a couple motels and a large lofts apartment building. I did not see the actual address "3141" I believe it is an address inside the apartments and that the apartments have their own address instead of the usual apartment number. There definitely is no legitmate business located there they probably have no actual connection to that address, I am sure it is a take your money and run scam from the way it all looks.