$800 WoW and SWTOR first time build

Approximate Purchase Date: This weekend

Budget Range: $700-$900 After Rebates

System Usage from Most to Least Important: World of Warcraft, Star Wars The Old Republic, interet surfing/email, netflix

Parts Not Required: PSU: coolmax V-600, dvd drive, mouse, monitor, maybe keyboard (have ps2 ergonomic, if getting usb keyboard also needs to be split/ergonomic), speakers


Preferred Website(s) for Parts: tigersdirect, newegg.com

Country: US (California)

Parts Preferences: by brand or type

Overclocking: Maybe (haven't yet, would like the option)

SLI or Crossfire: Maybe - only getting one graphics card now, option/upgrade would be nice

Additional Comments: reasonably quiet would be nice - i've had problems with overheating in the past (but didn't have gaming cases)
First time I'll build my own - I've replaced graphics, psu, ram, harddrive, added sounded & wireless cards before
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Include a list of any parts you have already selected with descriptively labeled links for parts.

case Cooler Master HAF 912 RC-912-KKN1 Mid-Tower Computer Case - ATX, mATX ]http://www.newegg.com/Product/Product.aspx?Item=N82E16811119233&Tpk=Cooler%20Master%20HAF%20912] $49.99 after rebate

Intel® Core™ i5-2500K 3.30 GHz 6M Intel Smart Cache LGA1155 http://www.newegg.com/Product/Product.aspx?Item=N82E168... $219

uncertain if need to get a cpu cooler/heatsink if I'm not starting overclocked (know I'll need something mroe if I go for overcloking later, also got swamped with options)

Windows 7 home $99

Patriot G2 Series PGD38G1600ELK Division 2 Edition Desktop Memory Kit - 8GB (2 x 4GB) PC3-12800, DDR3 1600MHz, 9-9-9-24 CAS Latency, XMP Ready ]http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=7114146&sku=P33-5305] $29.99 after rebate

z68 motherboard, haven't been able to pick one, decent (reliable) brand

debating geforce 550 ti, or radeon 6790, or a step up from either of those, had nvidia prefferance through years of playing WoW but not really attached, also want decent/reliable brand
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130629 $123.89 after rebate
or
http://www.tigerdirect.com/applications/SearchTools/ite... $119.99 after rebate

Opinions/advice appreciated.