Okay, now I'm thoroughly confused. Pentium 4D and Pentium D are two different processors? The guy told me the P4D is a dual core but not the newer Duo2Core or something.

Yes, I do want to play Doom 3, which not even my Dell i8500 P4 2.0 can handle (based on what I've read of the game system requirements. This computer I'm interested in buying has a 156(?) video card and 160GB SATA Western Digital hardrive.

I do tend to use multiple programs on my current P3 desktop. I want to get this computer this weekend.