One thing I noticed is that the 12V1 & 12V2 lines is at only 11a each on the Athena psu. I think I've done my research right, and 11 amps is not enough. 18-20a is recommended.
I think I will buy the new Seasonic one, it's better quality compared to my current one probably (IN Win, had it for a few years), and it does offer about 10 more watts on the 12V lines, somehow..plus I've seen a bad review on another Athena PSU that doesn't sound exactly promising
If I find that's not enough power for everything, I'll consider upgrading my case, I guess, and get a psu that is.