Newbie Computer Builder looking for Help

APPROXIMATE PURCHASE DATE: Within the next month or so

BUDGET RANGE: 1000$ or below before rebates!

SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: Gaming! Very important

PARTS NOT REQUIRED: Keyboard, Monitor, Mouse, Speakers

PREFERRED WEBSITE(S) FOR PARTS: newegg.com preferably, if there are any websites out there on par with newegg.com then I don't mind

COUNTRY OF ORIGIN: United States

PARTS PREFERENCES: I like GeForce GPUs and Intel CPUs

OVERCLOCKING: Maybe, I'd like to but don't know how

SLI OR CROSSFIRE: Maybe SLI, if one GPU is not enough

MONITOR RESOLUTION: 1920x1080, but if settings can be maxed at 1440x900 for a lot cheaper that would be better

ADDITIONAL COMMENTS: I'm looking to run Aion at max settings, additionally if it can be future proofed for games such as FFXIV or SWTOR that would be great too, otherwise I am focused purely on Aion

I am looking for this computer to have atleast 4gb of RAM minimum, I don't really know the difference between DDR2 and DDR3. I do not know how much of a difference there is between duo and quad cores, whichever synergizes better with the other parts would be good with me. I have had a lot of people point me towards cyberpowerpc and ibuypower, etc, but I do not know if these places are a ripoff or not. If anyone could enlighten me with suggestions that would be great.