Moved to
"Computer Build Help".
(Also, your thread got caught in the spam filter, sorry about that).
First off I would suggest that you pay this thread a visit:
http://www.mmo-champion.com/threads/...-build-Read-me!
We need to know exactly what your budget should include. Monitor? A Windows 7 license? Keyboard and mouse?
Further, if you only play World of Warcraft there is really no need to get a GTX 570 or a GTX 580, unless you have a resolution much greater than 1920x1080. A GTX 460 or a Radeon 6870 is well enough to max this game out. As for streaming and recording, it is much more important to have a powerful CPU and (for streaming) a powerful upload as well as a powerful service (that allows for say, at least 2-4Mbps - you generally have to pay for anything about 800Kbps).
Looking over at a list of sample builds,
http://www.mmo-champion.com/threads/...-Sample-Builds, I'd suggest something like the Gaming 850 build as a solid choice. If you do rendering, you might want to swap out that P67 board for a Z68 (e.g. the one from the Gaming 1000 build). If you prefer nVidia, you can swap out the GPU for a GTX 560 Ti, but the extra 2GB vRAM on the 6950 might help if you are vRAM starved (resolutions higher than 1080p).