New to homebuilt computers suggestions and recommendations please

So a couple of weeks ago I was helping my parents take our 2 crappy computers to make a crap-mediocre one, because both were flat out horrible. We also have a semi-new desktop from dell which is 3 years old and I'm primary using my laptop now for web surfing.

But I've really wanted to get back into playing some computer games mostly Rts's and a few first person shooters and well we don't have anything that can do that at the moment. So I've become pretty interested in building my own as a sort of self graduation present. hopefully for around $1000ish and probably going to do a least a mild OC. I don't need a monitor or keyboard or mouse at the moment as I'll probably just steal them off another computer, hopefully buy one just for this build.

Here are my (probably poorly chosen) components I've been researching

CPU:$279 Intel Core i7 920 Nehalem 2.66GHz 4 x 256KB L2 Cache 8MB L3 Cache LGA 1366 130W Quad-Core Processor - Retail
I was thinking going for a q 9550 but I figured since I want to make this build last pretty long that I better go with the lower end of the new technology over the best of the old
http://www.newegg.com/Product/Prod [...] 6819115202

Motherboard: $269 EVGA X58 SLI Motherboard - LGA 1366, Intel X58, SATA, SLI Ready, CrossFireX Ready, Triple Channel DDR3 support, RAID, Hyperthreading support
http://www.tigerdirect.com/applica [...] =E145-2055

CPU fan: $79Noctua NH-U12P SE1366 CPU Cooler - LGA1366, Core i7 Support, Copper Base, Copper Heatpipes, Aluminum Fins
http://www.tigerdirect.com/applica [...] =N126-1006

RAM: $95 OCZ Platinum Tri Channel 6GB PC10666 DDR3 Memory - 1333MHz, 6144MB (3 x 2048)
http://www.tigerdirect.com/applica [...] =O261-7512

PSU: $89 OCZ GameXStream 700-Watt Power Supply - Refurbished, SLI-Ready, Active PFC
http://www.tigerdirect.com/applica [...] =O261-2022

HDD: $59 Western Digital Caviar SE16 500GB Hard Drive - 7200, 16MB, SATA-300, OEM
http://www.tigerdirect.com/applica [...] SD-500AAKS

Optical Drive: $25 LG GH22NP20 DVD Writer - 22x DVD+R, 8X DVD+RW, 22x DVD-R, 6x DVD-RW, 16X DVD-ROM, 12x DVD-RAM, IDE
http://www.tigerdirect.com/applica [...] 1004%20OEM

Case: $139 Thermaltake VH8000BWS Armor+ MX ATX Mid-Tower Case - 230mm Fan
http://www.tigerdirect.com/applica [...] =T925-1258

Video Cards: I'm sort of stuck between these two
$239 with rebate DIAMOND 4890PE51GSB Radeon HD 4890 1GB 256-bit GDDR5 PCI Express 2.0 x16 Video Card - Retail
http://www.newegg.com/Product/Prod [...] 6814103075

$234 with rebate PNY VCGGTX275XPB GeForce GTX 275 896MB 448-bit DDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card - Retail
http://www.newegg.com/Product/Prod [...] 6814133268

Well that's about it, Please any input would be good even if you totally tell me that even one of these products are stupid. I've read alot of forums from other people and I think that this list is at least somewhat educated.