Welcome to the Forums.
To me the system looks pretty good. But then again my most current AMD is a Phenom 9950 lol.
One thing i personally would change in that list is to get the 125w 965, and not the 140w. I believe the 125w will run a little cooler, and from what ive read, it also overclocks better.
Also, if your gonna be doing heavy Gaming, i would suggest getting a 5870, it cost a little more, but the power of the 5870 is much higher then the 4890.
Maybe a few others will come in and help fine tune the system for you, like i said im a little behind on the AMD systems. Dont really have the funds to get a new system lol.
i7 2600K - Asus Maximus Extreme-Z - G.Skill DDR3 2133 CL9 - MSI 5870 - Corsair 1200w PSU - 2 x Western Digital Raptors Raid 0 - Swiftech Apogee XT Water Block - Swiftech MCP655 Pump - 120mm Quad Rad - Windows 7 - Ubuntu x64 5311Mhz Validation