I don't know who posts the best NVIDIA information or the most interesting news threads, but the best PSU info can be posted by these people (this is an incomplete and very random list):
I feel like I'm leaving a few people out, so I apologize to anyone I left out who feels that they should be on this list.
Now, there's one problem that I see with subscribing to someone's profile: you will see every post that they submit. That can get kind of irritating after a while because of course, not every post they make will be of interest to you.
Anyway, this is probably just about all I can contribute to your thread. I hope that it's helpful.