After a while on the HP site, I've customized two computers. They are both $734.99. I am a student, movie watcher and a pretty heavy gamer. I am wondering, which computer best suits my needs? HP Pavilion p6180t customizable Desktop PC AV129AV#ABA (Original Price $1 034.99) Genuine Windows Vista Home Premium with Service Pack 1 (64-bit) Intel(R) Core(TM) 2 Quad processor Q8400 [2.66GHz, 4MB L2, 1333MHz FSB] 6GB DDR3-1066MHz SDRAM [4 DIMMs] FREE UPGRADE! 640GB 7200 rpm SATA 3Gb/s hard drive from 500GB 1GB ATI Radeon HD 4650 [DVI, HDMI, VGA] LightScribe 16X max. DVD+/-R/RW SuperMulti drive Wireless-G LAN card 15-in-1 memory card reader, 2 USB, audio No TV Tuner w/remote control Integrated 7.1 channel sound with front audio ports 20% OFF! HP USB 2.0 stereo speakers HP multimedia keyboard and HP optical mouse Microsoft(R) Works 9.0 No additional security software HP Home & Home Office Store in-box envelope HP Pavilion Elite e9105z customizable Desktop PC AV307AV#ABA (Original Price $934.99) Genuine Windows Vista Home Premium with Service Pack 1 (64-bit) AMD Phenom(TM) II X4 920 quad-core processor [2.8GHz, 2MB L2 + 6MB L3 shared, up to 4000MT/s] FREE UPGRADE! 6GB DDR2-800MHz SDRAM [3 DIMMs] from 4GB FREE UPGRADE! 750GB 7200 rpm SATA 3Gb/s hard drive from 640GB 1GB NVIDIA GeForce GT 220 [DVI, HDMI, VGA] LightScribe 16X max. DVD+/-R/RW SuperMulti drive Wireless-N LAN card and external modem 15-in-1 memory card reader, 1 USB, 1394, audio No TV Tuner w/remote control Integrated 7.1 channel sound with front audio ports 20% OFF! HP USB 2.0 stereo speakers HP multimedia keyboard and HP optical mouse Microsoft(R) Works 9.0 Norton Internet Security(TM) 2009 - 15 month HP Home & Home Office Store in-box envelope Some main details: why is the AMD one cheaper by so much? Does the difference between Intel/AMD have a big affect on game playing? Are the graphic cards good?