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
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.