Please assist, new build ~1000

Approximate Purchase Date: December/January

Budget Range: 800-1000; I am willing to go slightly overbudget if the value is there.

System Usage: Gaming (Starcraft 2, WoW), Some programming, Some VM, Internet browsing, streaming movies, watching DVDs

Parts Not Required: Keyboard, Mouse, Speakers, Monitor. I will probably get these, but I am not including them in the build; only the tower.

Preferred Website(s) for Parts: Newegg and Amazon primarily; I have a Fry's nearby as well.

Country of Origin: (USA)

Parts Preferences: I believe I would like to do a Phenom II 955 build because of the value that is there, but I am also open to the i5-750 with the right build. As far as graphics cards go, I'm open to suggestions.

Overclocking: At some point. Nothing extreme.

SLI or Crossfire: I would like the build to have one graphics card at first, with the idea that I would buy another of the same card further down the road and set up dual GPU.

Monitor Resolution: Currently 1680 x 1050, but please use 1920 x 1080 when reccomending video cards, as that is what resolution monitor I will be purchasing in the near future.

Additional Comments: I have no problem sinking a good chunk of my budget into the case/power supply, as these parts are integral in creating a high performance machine. I definitely want a modular power supply. I've pretty much already decided on either an XFX or a Corsair power supply (both very highly rated), and as far as cases go I really like the HAF 932, HAF 942, and Corsair 600t. I am definitely open to suggestions however. With any case, cable management features are a MUST; I want a very clean look to my build.
------------------------------
Some Background Info

Attending school to work in IT/Network Administration/Wherever I can land a job. Currently running a Frankenstein PC from some years back; Athlon 64 4000+, 3 GB RAM, DFI Lanparty motherboard; my tech savvy classmates and friends all have better machines than me and it's time to fight back lol. I'm ready to step into a new machine.