I prefer Intel and NVidia because I have had a better experience with them in the past.
I like the idea of overclocking, but unsure if it is necessary.
I like the idea of SLI, but unsure if a single card would better suit my needs.
I want to upgrade because my current pc is simply old and unable to run the current FPS games at decent fraps or graphic settings. I bought my current pc about 4 years ago and upgraded the video card about a year and a half ago. Currently, the CPU is pegged at around 100% when I play any fps game on low settings. I would like to be able to play on high or ultra high settings on most games.
Consider this build. For gaming, you don't have to go any higher than this, you'll be able to play all games maxed out smoothly. This build is also much cheaper and leaves money so you could buy a headset, a keyboard and a mouse. You can also save the extra money for future upgrades.