Yeah, I buy cases ahead of time all the time, I caught a couple of awesome deals on sturdy but cheap cases -
I dunno man, $50 for a case when you're trying to save money, to me that's at least $20 too much. And that 2nd case, ehhhh, you have to pay $9 shipping so you're only saving a bit over $10. Don't buy a case for the included fans, you can buy a pack of 3 or 4 decent case fans for $10 IF your case even needs the extra cooling. Til they come in, if it runs too hot take the side panel off and blow a box fan or house fan in there, that's fine for a few days til your additional cooling ships.
And at least look at the cases on sale,
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=40000007%20100182&IsNodeId=1&bop=And&Order=PRICE&PageSize=20 they have free shipping and yea some have annoying rebates and that annoying side window, but I've bought those to save money and I stick em under the desk or something so I don't have to look at the window
And make SURE you look at the discount codes, a lot of 'em are another $10 off.
Like this case comes out to $20 with free shipping, after the CLMBSDAY11 code and an annoying $15 rebate.
http://www.newegg.com/Product/Product.aspx?Item=N82E16811156277 So far I've gotten every rebate from coolermaster, it does take a couple months usually though
And you can always not plug in the annoying LEDs :p Reasonable reviews, Coolermaster cases range from not-horrible to pretty good (ahh the old Centurion cases, those were a hell of a value). Oops this one's a Raidmax brand, I think I used a couple of those for something, they were definitely OK for the price too.
Oh and remember you can access the USB ports on the motherboard in the back of the case too, you're not limited to whatever few they stick on the front.
Edit: Oh and $40 + shipping for a 400 watt non-80plus certified PSU? Antec's not a *bad* brand, but it's nothing special. Ehhhhh, I'd look at what's on sale closer to your date - keep your eye open around Black Friday week, a lot of stuff's gonna be on sale then. I think you could at least get a better quality one than this for $40 + shipping...