your fine. you can play mw2 fine with an i3 1st gen haha.
6gb of ram is kinda overkill, but hey it's nice to have (4gb recommended)
as your blueray wrighter... I've had tons of issues with them in the past, idk why. fails sometimes. make sure you keep drivers up to date, and get a 30GB SSD for your OS to run on. your os will be fast, and use your HDD for the data.
oh, and another thing... what is your cooling going to be? (fan or heatsink for your cpu)