you are planning dont go for amd amd not too good
go for intel
graphics card i am using 260gtx
it works fine on new games and now it is so cheap you can also go for sli
it costs around 300 bux before but only around 200 ish.. now if you live near micro center cost like 150 now online cost 200 ish..
cpu people say intel I-7 920 is good but also you need to have ddr 3 memory for mobo that fits.
budget should be around 1000 usd
but best way is dunt listen to people just go grab a pc magazine and see what the professionals are saying. they are the expert on those information
go barns and noble and just check out pc magazines would be best solution.