My eyes popped out when I saw the Hyper 612 cooler. I didn't know there was a 612. All the cool kids are getting 212s
The HD 6850 will outperform the GTX 550 Ti at the same price .
That's more power supply than you need. I've been pushing this all day; it's a fantastic deal at $30 and still more than enough power (I have a similar system, 2600k @ 4.6 GHz and GTX 460, and completely maxed out with Folding@Home and Furmark, it tops out around 330 W).