Pretty similar to my build actually. I even used the Antec 300 although i did use a OCZ power supply instead of an antec. Youve gotta be careful with p/s selection since the 300 is a bottom mount p/s case (which i do like ALOT). I used the Biostar TForce ta790gx mobo with 8gb of 1066 g.skill ram and also i used two of those hitachi 500gb drives but in a raid configuration. I also used a geforce gts 250 instead of an ATI card.