So you made this account to bump a 2 month old thread?Oh, my goodness, I feel very sorry for anyone who stumbled upon this thread in the process of upgrading their system with holiday cash, or adding parts to their wish-list.
World of Warcraft does not require a thousand dollar (or pound if you're a redcoat) computer to play on ultra. Not even close.
A mainstream graphics card, and a mainstream/enthusiast processor (quad core) is plenty enough to run this game on ultra without any Multisampling. The 6850/6870 (AMD Radeon) and above, and Nvidia's GTX 460 (1 GB DDR5) and above is plenty, if not overkill for this title. Now, whether you want to play with 8x Anti-aliasing and 16x Anisotropic filtering and Ultra shadows is up to you. As far as "Ultra" quality, the components the OP suggested is far too overkill. A mid-range quad core and an enthusiast level i7 system has very little effect on video game/application performance.
My recommendations (I am a software engineer by day, and even bigger geek by night):
Intel Core i5-750 or higher
AMD Phenom II X4 955 or higher
AMD HD Radeon 6850 or higher
Nvidia GTX 460 (1GB DDR5 model) or higher
A decent aftermarket CPU heatsink for overclocking, at least 2 GB system memory for 32-bit Operating Systems, and 4 GB system memory for 64-bit Operating Systems. If you are playing on a monitor with resolutions beyond 1920x1080 and 1920x1080, then you probably don't need to read this forum to solve your performance issues.
High-end storage has very little performance gain on WoW, with the exception of instance loading times. Even the fastest solid-state drive technology out there will NOT improve your frame-rates.
To the original poster, do your homework before telling someone to spend 1500 dollars for a game mostly based on directx 9 texture rendering.