If you are interested in a great Aluminum case that will last you for years to come, Lain Li makes one of the best cases around and can e purchased for around $110 (without the PSU)to take a look at a review, look at <A HREF="http://www.hwextreme.com/reviews/cases/lian-li_pc70/" target="_new"> Hardware Extreme</A>, to find a good place to buy, try <A HREF="http://www.newegg.com/app/ViewProduct.asp?submit=BROWSE&manufactory=1375" target="_new">newegg.com</A>. If you do not want to spend that much, I suggest the Antex <A HREF="http://www.antec-inc.com/product/cases/perfhome.html" target="_new">Preformance Series</A>. both of these make upgrading your system very easy, and all are good quality cases that will not dent or give your problems over the years that you will be using them.
Antex power supplies are high quality and rank right up there with Enermax and Sparkle, since I have no experience with ATX case brand, I cannot recommend their Power supply to go with this Motherboard. I would make a safe bet and buy an antec 350 Watt case before buying an offbrand 400 W case, mainly because what the company may report as being 400 W may be peak wattage, and under normal circumstances, it may only be 300 W.
If you are planning on spending 1000-1500 per computer, these cases should be in your budget range, with lots to spend on other stuff. Remember, if you are a computer builder, more than likely, you will use one case and go through contless Video, audio, and motherboards. treat youself now and get a case that can expand with your needs.
If it works for you then don't fix it.