1. Don't worry, you wont be needing the extra 200 Mhz for gaming. Stick to the 955 & OC it to ~4.0 maybe if you want to.
2. Not absolutely important, but the CL7/8/9 kits are basically the same price. So get CL7 if you can get a combo going.
Never used a Tuniq PSU. No idea 'bout how good or otherwise the brand is. Better brands include Seasonic, Corsair, Antec, CoolerMaster etc. IMO.
Now that you're going with a 460, you do realize that your board won't support SLI in the future, right? If you wanna keep that option of a 2nd Gfx card open, go with either a NVidia chipset board, or an ATI GPU.
The rest of your build looks like a pretty good gaming build.
1. Thanks. I'll stick with the 955
2. I couldn't find a good combo with CL7 memory. From what I've read it would only have a 1%-2% improvement. If anyone sees a good CL7 deal let me know. It seems the memory I have selected should OC fine based on the reviews.
The reviews look ok for the Tuniq PSU. I couldn't find a good deal on a named brand in the 600-700w range.
You editing your Original Post, makes mine look pretty absurd & meaningless. Also I don't recall the board you linked or the questions you had. Anyways, for under 750 bucks, If you value FPS above everything else @ 1920p X 1080 (1680 X 1050 is also pretty high-ish)
Total Cost - $744 + Shipping. This one really beats the 955/5830 or 955/460 rigs hollow as a pure gaming & HTPC system.
P.S. - You can go with a cheaper PSU if you don't wish to Xfire that 5850 in the future. I'm only giving you this config 'coz you said that you're open to other suggestions. You can stick to the 955 rig if you want to. Or, if you're really feeling flush, swap out the 440 with the 955 for 75 bucks extra.
Also, I can make these same specs slightly cheaper by going with lesser known brands, but I stick to a handful of reliable, well established brands in each category.