Can I just second choosing a new HSF, in addition to the rather poor thermal results on the hexus review it is an absolute nightmare to install. I did one with my first build a few months ago and it took me an age to get it in properly and it was very difficult to screw down and I cut myself fairly badly in doing so.
I'd get an SATA DVD drive as well, those big ide cables don't do any good for the airflow and the jmicron ide controller on the p5k isn't supposed to be too good.
Build it yourself and good luck. I'm glad I did, despite my mortal wounding from the NH-U12
