Angelfish USA is legit, another good source that I have used was Villa's City of Angelfish in PA. I got my Altums from him. Dantums are suppoed to be an Altum/Scalar cross they are interesting looking fish. I would prefer tank breed Altums or wild Scalar but that's just my preferance I don't like the washed out look of these Dantum albinos but the body shape and fins are nice. Another species worth looking into is P. leopoldi they are the smallest species of angelfish with nice colors and not seen too often. I have a nice group of 6 in a 90 gallon tank.