Nothing against them at all, I like the PC P & C you chose, just giving alternates. Hey and if you can get the power supply locally, it's like getting free overnight shipping
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The new Antec is better than what they have been in the past, really cant comment here because my Seasonic 500 Earthwatts unit is still going strong as ever after 4 years.
Why modular? PM me if you wish to tell me if its a secret. Speaking of microcenter, hit me up before you go I think i might get a 2500k & board combo if you are willing.