$2000 gaming/3d modeling machine

Hi everyone,

Im looking for a new build to replace my aging 9 year old (almost like a child) PC. I need the new build to handle well the latest games set on high resolutions and med-high settings as well as 3D modeling (using apps like 3dsmax) and some mild rendering and a bit of photoshop editing. I need the PC to also handle well programming as i just started my CS bachelor degree.

APPROXIMATE PURCHASE DATE: this week (the closer the better))

BUDGET RANGE: around 2000 (the lower the better)

SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: programming (im studying for a CS degree right now), gaming, 3d modeling and mild rendering, photoshop editing.

PARTS NOT REQUIRED: OS

PREFERRED WEBSITE(S) FOR PARTS:

COUNTRY OF ORIGIN: ok..., i will be buying the parts in Israel (where i live) but the price i stated is corresponding to US prices (without taking into account discounts and rebates).

PARTS PREFERENCES: I was thinking of Intel's core i7-930/920 CPU (maybe the i7-860 would be better?), and i can't decide between GTX 470 and HD 5850 GPUs... for games i think they are relatively the same but for other purposes (like 3d work) i don't really know.
Im not sure what size of monitor i want... i think something around 24-27" would be nice or maybe i better go for a bigger LCD TV (aren't they cheaper?)

OVERCLOCKING: Yes

SLI OR CROSSFIRE: Yes

MONITOR RESOLUTION: 1920x1080 or 1920x1200

ADDITIONAL COMMENTS: I would like a quiet and cool (as in cold  ) PC. I need it to last for at least 4 years. What manufacturers should i look at if going NVIDIA way or ATI way?

Thank you very very much