I am building my first system.. It will be built mostly for MMOs (WoW, Operation 7, Combat Arms, Rappelz, Aion), video editing (Sony Vegas 8.0) image editing (Adobe Photoshop). I am seeking help for various parts in my build. I am buying my processor from my local MicroCenter because I don't want to take the risk in it getting here DOA from shipping or mistreatment, plus its cheaper. I am working with a $396 budget atm to get the rest of my parts. I don't mnd ordering from newegg as long as its not my processor. My monitor resolution is 1600x900 (VGA) but I most likely will buy a DVI to VGA adapter. I am putting a (?) behind the parts I am most unsure about. I am most unsure about the video card due to the worry if it'd fit in my CM Storm Scout Mid Tower (Leaning towards ATI over Nvidia). I welcome opinions, words of advice and understanding for a firstime builder. Thank you
Video editing is the only thing there really pushing you in any direction with regard to ATI / nVidia where nVidia's CUDA support is helpful. If you're adding Adobe Creative Suite to the mix, there's more CUDA support benefits there.
At 1600 res, the cards you listed will work, but if moving to 1920 x 1080 is in your future, I'd go for a 5850 or 460 SC. At 1600 res, Id grab a 5750/5770 or GTS 450
since you will be using adobe and sony i would recomend the i5 760 since you will get more benefits from the quad.
For the ram once again i would with the 4 due to the type of programs you will use. Just using my computer on a regular day my ram usage goes to about 2.5
for a video card, your games don't seem to intensive so a 5770 would serve you well, if your a decently hardcore gamer i would say try to look at the gtx 460 from nivida. You shouldnt have any issues with card size in that case, im pretty sure you can fit a 5870 if you wanted to.