The specs of my comp (it was top of the line at time of build):
* Processor: Core 2 Duo
E6600@2.4GHz
* Motherboard: Gigabyte GA-965P-DS3
* Memory: 2GB Kingston DDR2-667
* Video Card: ATI Radeon X1800XT
* Sound Card: Creative X-Fi XtremeMusic
* PSU: Hiper 580w Modular PSU
* Hard Drives: WD Raptor 10000RPM 36GB / Barracuda 7200.10 320GB
* TV Tuner Card: Hauppauge PVR-350
* DVD Burner: NEC DVD+-RW burner
* CPU Cooler: Zalman 9500
* Case: Thermaltake Tsunami Dream w/ window
That, plus a 19"w LCD and a 5.1 speaker system set me back $2200. Those specs were top of the line last September.
For TotL now, get a better vid card. The rest is still pretty much top of the line even now.