If you don't mind overclocking I built my work PC for less and have it clocked at 3.2Ghz and it still stays really cool. I could go to 3.8 with another memory divider.
http://www.newegg.com/Product/Product.aspx?Item=N82E16819116063 (these can reach well over 3.0Ghz with just a minor cooling upgrade)
http://www.newegg.com/Product/Product.aspx?Item=N82E16813127030 Very flexible board with two gig ports, e-sata and HD audio built in.
http://www.newegg.com/Product/Product.aspx?Item=N82E16820146118 I used these in a couple C2D builds and they overclock and you can still tighten the timings, plus with a bit more voltage the still run cool.
http://www.newegg.com/Product/Product.aspx?Item=N82E16835887002 Quiet, and excellent cooling for the $$$$$. I have used these and for air there isn't much better for the money.
http://www.newegg.com/Product/Product.aspx?Item=N82E16822148151 I have a spare 400 at home and used a few of these in builds, the perpendicular recording increases the speed or reads and writes beyond that of what a Raptor can do, plus a huge amount of capacity.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817256027 Energy efficient, quiet, stable, and best bang for the buck.
I am a ATI guy, so I could say that a HD3870 512MB card is the way to go, but in terms of $$ for performance right now the 8800GT is a bit better deal. the 3870 does have a few features for other people, like the UVD, and a true onboard HD audio, plus HDMI output. But this will be up to you as performance is almost identical.
Don't buy a SATA CD drive unless you really have a need for less cabling. Everyone I have head of that has them has issues. And unless you want to force all drives attached to that controller to a IDE compatability mode, or add the drivers to your windows installation for the interface you are stuck. This also limits using certain types of bootable CD's and in some cases the drive being available at all in safe mode. Some have had issues with restore mode of Windows unless you keep your original slipstreamed disk handy.