I recently updated mine from

[oliverredfox]

I recently updated mine from using NTSC and QAM tuners to Cable Card & added a SSD for the OS drive.  My 5 year old dual core (wow) is still running strong and is more than enough for what it does.  The SSD makes it run much smoother and it feels like a new machine.  And the SiliconDust network cable card tuner let me put my router, cable modem, and cable card device by the cable entry point and I can network to my HTPC anywhere I want it.  Being no longer forced to put the HTPC near a cable line for NTSC input really opened up my living room.