Computer Build- $1200 limit

Hey, I'm building a new computer, and I have a very minimal knowledge of what I actually need for what I'm looking for.
What I do know is that I have a limit of $1200 limit, although less would be nice.
I'm looking to play current-generation games, as they may come out over the next year or two.
I'm also looking for relatively upgradable graphics cards ( I'm thinking of getting 2 of them )
Can you give me some advice or some examples of builds as to what I may be able to obtain with these specifications?

Here's what I was thinking, but now that I look at it, it isn't the best system.

Motherboard ASUS P5N-D LGA 775 NVIDIA nForce 750i SLI ATX Intel Motherboard
Processor/RAM Intel Core 2 Quad Q6700 Processor
Video Card nVidia GeForce 9800 GTX +
Hard Drive Seagate Barracuda 7200.11 1TB
Case Apevia Black X-Plorer ATX
Power Supply Antec Neo Power
OS Vista Home Premium x64
DVD Burner Lite On IHAS222-06 DVD Burner
Fan Ultra X-Wind Aluminum Socket K8/AM2 CPU Cooling Fa
Arctic Cooling Freezer 7 Pro
Arctic Silver 5 Thermal Compound

^ Well that system is certainly looking out of place...

Just add replies to these so that we can suggest the best components for your...
http://www.tomshardware.com/forum/ [...] ild-advice
APPROXIMATE PURCHASE DATE: (example: tomorrow -- the closer the better) BUDGET RANGE: (example: US$500-750)

SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: (example: Folding@Home, gaming, surfing the internet, watching movies)

PARTS NOT REQUIRED: (examples: keyboard, mouse, monitor, speakers, OS) **Include Power Supply Make & Model If Re-using**

PREFERRED WEBSITE(S) FOR PARTS: (examples: newegg.com, ncix.com, ebuyer.com -- this is to help others see available options and prices)

PARTS PREFERENCES: by brand or type (example: I would like to use an AMD CPU & Biostar mobo with a 24" LCD and full tower case)

OVERCLOCKING: Yes / No / Maybe SLI OR CROSSFIRE: Yes / No / Maybe

MONITOR RESOLUTION: (examples: 1024x768, 1280x1024, 1440x900, 1600x1200, 1680x1050, 1920x1080, 1920x1200)

ADDITIONAL COMMENTS: (examples: Need to have a window and lots of bling, I would like a quiet PC)

^ +1
But changing that mobo to the UD4P would be better
$30 more but you get SLI certified mobo, right out of the box, and with 6 RAM slots

^ Well done

The i7 has tri-channel memory controller inbuilt...So why not put it to good use ? and you should stick with tri-channel RAMs...
So either go with 3x1GB kit or better 3x2GB kits...
And here at Toms, they had checked these 2 memory configs and have come to a conclusion that i7 better utilizes the 6GB configuration...
But if you are tight on budget, then get 3x1GB kit for now and add one more kit later...
But can you give the max budget, so that we can see if we can do some cost cutting...

On newegg for the Antec 300 they have a combo deal for a power supply that is 650W instead of my initial 750W
http://www.newegg.com/Product/Prod [...] 6817371015
instead of
http://www.newegg.com/Product/Prod [...] 6817139006
assuming that most of the parts include those which you gave in an above comment, would it be beneficial to switch to the 650, or would it not be?
My build is currently consisting of an nVidia GTX 260 as well as an i7 processor.