Help on New Build

I'm looking for a little help as I attempt my first build. I have not messed with hardware since I overclocked my TRS 80 a long time ago. I want to build a computer that will not go obsolete to rapidly and that can serve as the storage site on my network. I plan to back up my laptop to this RAID drive. The only power intensive apps I use Dragon NaturallySpeaking and OCR. My first priorities are stability, and quietness. Cost is not such a big issue. So here's what I'm planning to put together and I hope you can let me know if I've gotten anything in here that is obviously wrong. I know this is pretty overpowered for what I am using it for. I am thinking that there may be much more sophisticated voice recognition that requires more power,and I want my voice recognition running as smoothly and quickly as possible. Any thoughts about this?

Mo's Workhorse $948
Processor:
Intel Core i7-2600 Sandy Bridge 3.4GHz (3.8GHz Turbo Boost) 4 x 256KB L2 Cache 8MB L3 Cache LGA 1155 95W Quad-Core Desktop Processor BX80623I72600 $299.99
http://www.newegg.com/Product/Prod [...] 6819115071

Motherboard:
ASUS P8Z68-V LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard $179
http://www.newegg.com/Product/Prod [...] -_-Product

RAM:
Mushkin Enhanced Silverline 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model 996770 $64.99
http://www.newegg.com/Product/Prod [...] 6820226095

Graphics Card: None

Hard Drive:
Raid 0- (2)Western Digital Caviar Black WD1002FAEX 1TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive $89.99X2=$179.98
http://www.newegg.com/Product/Prod [...] 6822136533

Case:
Antec Sonata Elite Black 0.8mm cold rolled steel ATX Mid Tower Computer Case $90
http://www.newegg.com/Product/Prod [...] -_-Product
Power Supply:
Antec CP-850 850W Continuous Power CPX SLI Certified CrossFire Ready 80 PLUS Certified Modular Active PFC "compatible with Core i7" Power Supply $114.00
http://www.newegg.com/Product/Prod [...] c%20cp-850

Cooling: None

DVD Burner:
ASUS 24X DVD Burner - Bulk 24X DVD+R 8X DVD+RW 12X DVD+R DL 24X DVD-R 6X DVD-RW 16X DVD-ROM 48X CD-R 32X CD-RW 48X CD-ROM Black SATA Model DRW-24B1ST/BLK/B/AS - OEM $20
http://www.newegg.com/Product/Prod [...] j3c2g9yw2r

Is there any particular reason you chose a board meant for dual vid cards...along with that 850w psu, or is this going to be used for gaming also ?

Thanks for asking. The 850 w psu is there just because I might need power in the future. I suppose I could downgrade the psu. I thought that z68 mobo allowed me to use the onboard video in the i7 and was a better option than a h67 board. What mobo & psu would you recommend I step down to if I see that as overkill?