Way more than enough power to supply that system. 1 KW!?! Please read the Power Supply thread if you are serious.
I personally would get another case, but cases are really all about personal taste. There are plenty of other cases that cool much better for the price. Also, are you planning on SLi'ing? If not then get the DS3-L or IP35-E motherboards. Same performance, but much cheaper without all the SLi stuff.