probably a stupid question, but the usb headers are only 3.0. even though the mobo i chose supports 3.0, [AMD] i think most things are for the most part using usb 2.0.
the antec 302 sounds better because it is larger, but i do not want to pay for a 3.0 to 2.0 converter.
302 definitely seems the better deal if you can get the extra $10 rebate thingy.
You won't be able to use the front USB unless you change your choice of motherboard or buy an in-line adaptor OR PCI USB 3.0 card, as it looks like your motherboard doesn't come with a USB3.0 header.
Nothing specifically needs USB3.0 yet, and everything is backwards compatible so you just get slower transfer rates. If that's fine for you, then there's no harm getting a USB2.0 front panel case. If you are happy with reaching behind your PC should you want to speed things along, you don't really loose anything.