When I was researching for a new PSU to upgrade from my PCP&C TC850-SSI, I looked at [H]'s review of the Seasonic X Series and decided to buy an X750. It's definitely the best PSU upgrade I've ever done. It's so much quieter then my old PCP&C unit, and I like that it's a modular PSU (my first one).
SILENCE.. has to be one of the favorites for me from Seasonic. We all know they build quality power supplies. You think about the name "Seasonic" and it makes me think about the noise of an ocean... smooth and pleasant to listen to. This is how I would describe thier power supplies.
Love me some Seasonic Power Supplies. Excellent performance and reliability. Pretty much most every power supply I use or recommend has Seasonic Internals.