Not sure that the Thermaltake one is a re-badged Seasonic. But anyways, its true enough, if I were going to answer the OP's question directly: the best brand is currently Seasonic. It has also historically been Seasonic and likely to remain Seasonic in the future. Just in case they slip up or there's a re-branded Seasonic available at a lower price, I think its a good idea to do some research, review-reading, and deal-finding, none-the-less.