I'm a bit confused, you have a Corsair 1200 PSU and you are getting tired of people pushing Corsair/Seasonic PSU's?
I use a variety of PSU's in my machines, Seasonic, PC Power & Cooling, Enermax, Corsair, Thermaltake, and even some "no name budget" units that I honestly can't remember any more. The reason why I usualy recommend Seasonic, PCP&C, and Enermax is because they are quality built units that often last me 7+ years. With me, they have a track history of being good units.
I'm sure some of the others you listed above might be just as good, but since I most often make recommendations to others based on what I've personally tried, since it is my name being used in the recommendation, not some 3rd party site, those are the supplies that I will go with.
Please don't take what I'm about to say the wrong way, but have you tried Kingwin, Super Flower, or NZXT power supplies yourself? Is your Corsair 1200 giving you issues? Are you in the market for another PSU because you are making another build? I'm just a bit confused by the post.