New build, input appreciated

[xhunterx405]

I will be using this computer for gaming, video editing, and watching movies. I am planning to get Windows XP, possibly media center so I can use my xbox 360 more.
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Antec Nine Hundred Black Steel ATX Mid Tower Computer Case - Retail
Item #: N82E16811129021
$139.99

GIGABYTE GA-P35-DS3R LGA 775 Intel P35 ATX Intel Motherboard - Retail
Item #: N82E16813128050
$129.99

EVGA 320-P2-N811-AR GeForce 8800GTS 320MB 320-bit GDDR3 PCI Express x16 HDCP Ready SLI Supported Video Card - Retail
Item #: N82E16814130082
$279.99

CORSAIR CMPSU-620HX ATX12V v2.2 and EPS12V 2.91 620W Power Supply - Retail
Item #: N82E16817139002
$189.99

Intel Core 2 Quad Q6600 Kentsfield 2.4GHz LGA 775 Processor Model BX80562Q6600 - Retail
Item #: N82E16819115017
$294.99

Crucial Ballistix 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model BL2KIT12864AA804 - Retail
Item #: N82E16820146565
$109.99

Seagate Barracuda 7200.10 ST3320620AS (Perpendicular Recording Technology) 320GB 7200 RPM SATA 3.0Gb/s Hard Drive - OEM
Item #: N82E16822148140
$79.99

LITE-ON 20X DVD±R DVD Burner With 12X DVD-RAM Write Black SATA Model LH-20A1S - Retail
Item #: N82E16827106057
$34.99

Total cost: $1259.92
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Is it worth the extra money to upgrade my video card and MB to:

GIGABYTE GA-P35-DQ6 LGA 775 Intel P35 ATX Intel Motherboard - Retail
Item#:N82E16813128046
Price: $229.99

EVGA 640-P2-N821-AR GeForce 8800GTS 640MB 320-bit GDDR3 PCI Express x16 HDCP Ready SLI Supported Video Card - Retail
Item#:N82E16814130071
Price: $379.99

Total cost: $1309.92

Or would it be better to change some of these items out? Any input would be much appreciated!

 

[Onus]

I like that build as it is. The gain you'd get from getting a GTS/640 seems slight unless your resolution is super high.

 

[Maziar]

i agree with JT ,also P35 DS3R is a good board , i think u shall stick with it