Its been great, Ne*phew*
Anyways .. few days ago, I was on the SAPPHIRE Pure line of PSU's thread on XS which basically started off with fanbois whining abt how it was not on a single rail and was modular ... with loads of the banana/eeks smileys, till the actual guruji's *yup, Jhonny bhai, Fuggy, Gautam, etc* took over.
Honestly, the single rail being better than multi rail .. n non-modular being more enthusiastic than modular, etc etc .. has all become talks of the stereotypes.
I know, I m one
But technically, check the difference Urself:
http://www.80plus.org/manu/psu/psu_reports/CORSAIR_CMPSU-450VX_450W_Report.pdf
http://www.80plus.org/manu/psu/psu_reports/SEASONIC_S12II-500Bronze_ECOS 1241_500W_Report.pdf
Check the cumulative of 12V, output watts, min/avg/max efficiency, etc n U yourself tell me whats better.
I don't remember the link but at this one review, they tried to pull more power from the +12V2 rail, by configuring very low current, on the 12V1 rail. They managed to pull over 23A 4m a single rail .. n it still had more juice left

hyeah:
See, Artic cooling's Fusion 550RF, Antec's EA500, Corsair's VX450, SilverPower's SS500, etc are all based on Seasonic's S12II 500W .. hence, very very identical ... and still ve their pro's and cons.
If U go to see the cost, warranty n stuff, VX450 is defly a better buy
in India n hence I suggested the OP to get the VX450W, in my previous post, yesterday.
But performance wise, Seasonic 500W does beats the VX 450W .. obviously, by a small margin.