First of all, Antec PSUs are not noisy at all. Some reviewers will test noise by ear or use an instrument. Experiments can have many factors and one has to take into account the sensitivity of instruments and their parameters. One person may test the noise level at 2 meters with some internal fluctuation, while another may test it at 1 meter with a different internal fluctuation. Basically, be careful about what a reviewer says, in reference to noise level. They could be testing it inside the case or outside the case and may or may not reveal that information.
In short, Antec's are not loud. I have an Antec 380 and a fortron 530W. Both are pretty quiet, and they weren't running in a lab with other computers. I read a review comparing the tagan and antec 480's and the tagan is definitely very nice. I need to read more about it, but it doesn't look bad at all. Oh, Fortron PSUs are fantastic.