[Solved] I7 860 build, mid-range, advice especially on MoBo, GPU, PSU?

APPROXIMATE PURCHASE DATE: Within the next 10 days
BUDGET RANGE: US$600-850

SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: Picasa, Hulu, Office (Word, PowerPoint, Excel), Home Video Editing, surfing internet

PARTS NOT REQUIRED: keyboard, mouse, monitor (have Dell UlraSharp 2208WFP), speakers, OS (have Windows 7 Home x64 on pre-order), HDD (have a new WD 640GB Caviar Black)

PREFERRED WEBSITE(S) FOR PARTS: MicroCenter (live near a retail store); NewEgg

PARTS PREFERENCES: Lynnfield i7; leaning AMD GPU

OVERCLOCKING: No (maybe if it is not too difficult)
SLI OR CROSSFIRE: No

MONITOR RESOLUTION: 1680x1050

ADDITIONAL COMMENTS:
This is my first build and it will replace my current 1.5 Ghz P4 that is almost 10 years old. I may add another HDD or two in the future, possibly setting them as RAID 0 or 1 (depending on my needs). I’ve listed a choice for all parts below. Please let me know if you see any inconsistencies or potential problems, and of course any better options.

Any comments on the mother board? I have had a hard time finding information on these new P55 boards.

I would like to have a reputable PSU, with as low a Wattage as I actually need.

Also, I’m considering getting a TV tuner to use this system as DVR. The GPU I selected has both DVI and HDMI out. Can I run dual (span) screens with the DVI connecting to my monitor and HDMI connecting to my TV (“Full HD” 1080p)? What other impacts would the TV tuner have on my system?

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Core i7 860 Processor Boxed $229.99

MSI P55-GD65 Socket 1156 P55 ATX Motherboard $149.99 (after $20 rebate)

OCZ PC3-10666 Platinum Low Voltage 4GB (2x2GB) Dual Channel Kit $84.99 (after $20 rebate)

ASUS EAH4670/DI/1GD3/V2 Radeon HD 4670 1GB 128-bit DDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail $54.99 (after $20 rebate)

Question – can I connect the DVI to my monitor (1680x1050) and the HDMI to my 1080p TV at the same time? Should I consider upgrading to the 4850?

COOLER MASTER RC-690-KKN1-GP Black SECC/ ABS ATX Mid Tower Computer Case - Retail $69.99

I’m open to other suggestions on the case. I want something that’s easy to work with and will keep cool. And while I don’t care much what it looks like, something that is more than just a black box gets bonus points.

StealthXStream 500 Watt ATX Power Supply $34.99 (after $20 rebate)

My main question here is how much power do I really need? Also, I was leaning towards a modular SeaSonic until I saw the price on this unit. Which is better? SeaSonic example: S12 Energy Plus SS-550HT 550W ATX12V V2.3 / EPS12V V2.91 which is $79.99 (after $10 rebate)

LightScribe 22x DVD±RW Burner with Dual/Double Layer Support OEM $29.99

Of all the research I’ve done, I have done the least on the CD/DVD burner. Any better recommendations?

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Total is $634.93 (including rebates, excluding tax and shipping). I’ve already spent $100 on the OS and HDD, so if I can keep these remaining components under $700, that would be preferred. But it’s not a hard ceiling.

Thanks in advance for your advice!

Thanks Why_Me. I'm giving the mother board a good look this morning.

One question though about the RAM. The OCZ I had picked is rated Cas Latency 7, Timing 7-7-7-20 (my original link was to MicroCenter because it was cheaper there after rebate, but it doesn't show the specs). The G.Skill you suggested is Cas Latency 9, Timing 9-9-9-24. I'm new to this so maybe I'm misunderstanding something, but I thought lower was better. Isn't the OCZ faster than the G.Skill?

Thanks again.

EDIT
I see the new link is for the Ripjaws DDR3 1600 (9-9-9-24). Thanks for pointing me in that direction!