NCQ is on by default. So don't worry.
See how your system does for a few days, and of course try a few games to see if they are stable etc.
switched both the HDD and the DVD drive from the 6g SATA 3 port to the standard SATA port and it seems the system boots a bit faster. no BSOD so far. thanx for ur informative and timely advice. i'll let u know how it goes. currently playing FEAR 3, MOH2010 and Bullet Storm.