The Mini ITx case you've chosen is incompatible with your MicroATX motherboard (its too small), and the PSU supplied with it would be insufficient even in the most spartan of setups. I suggest a small, cheap rosewill MicroATX mini tower and a good 80+ 400 to 500w+ power supply.
Okay i was wrong. it will fit. some idiot listed the board as MicroATX on google products. great decision on the psu. you should be able to keep the case and change out the psu. more info: http://www.apextechusa.com/products.asp?pID=171