Noob building a computer!

[hyopia]

Well its time I build a computer, Ive only partaken in building my schools computers, which was about 3 years ago and my rig is a total piece of crap. I just really need help, I am totally lost on up to date technology and such. Id really appreciate if you guys can point me in the direction of a decent gaming rig, I run Ubuntu, and I already have a monitor so I dont need another of those, my budget is around $500-$700. any help is greatly appreciated :).

[hyopia]

I got this build off another forum, don't know if its still upto date, what do you guys think?

Processor
Intel Core 2 Duo E7200 Wolfdale 2.53GHz 3MB L2 Cache LGA 775 65W Dual-Core Processor - $120
http://www.newegg.com/Product/Product.aspx?Item=N82E16819115052

Motherboard
BIOSTAR TForce TP45D2-A7 LGA 775 Intel P45 ATX Intel Motherboard - $99
http://www.newegg.com/Product/Product.aspx?Item=N82E16813138127

RAM
G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1000 (PC2 8000) - $70
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231174

Graphic Card
ZOTAC ZT-96TES3P-FCP GeForce 9600 GT 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card - $120 ( I need the videocard)
http://www.newegg.com/Product/Product.aspx?Item=N82E16814500018

Harddrive
Western Digital Caviar SE16 WD5000AAKS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s Hard Drive - $65
http://www.newegg.com/Product/Product.aspx?Item=N82E16822136073&Tpk=Western%20Digital%20Caviar%20SE16%20WD5000AAKS %20500GB%207200

CD/Dvd burner
LG Black 2MB Cache SATA 20X DVD±R DVD Burner w/ SecurDisc Tech - $24
http://www.newegg.com/Product/Product.aspx?Item=N82E16827136149&Tpk=LG%20Black%202MB%20Cache%20SATA%2020X%20DVD%u0 0b1R%20DVD%20Burner%20w%2f%20S

Case
LIAN LI PC-7B plus II Black Aluminum ATX Mid Tower Computer Case - $106
http://www.newegg.com/Product/Product.aspx?Item=N82E16811112099&Tpk=LIAN%20LI%20PC-7B%20plus%20II%20Black%20Aluminum%20ATX

Power Supply
CORSAIR CMPSU-550VX 550W ATX12V V2.2 Power Supply - $98
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139004&Tpk=CORSAIR%20CMPSU-550VX%20550W%20ATX12V%20V2.2%20Power%20Supply

Total=$702 w/o shipping.

[hockey man]

Well, try this 9800 GT over tha 9600 GT

http://www.newegg.com/Product/Product.aspx?Item=N82E16814127379