You know, that current system should play Doom 3 rather admirably. No, you won't get the resolution you desire, but you can still have the bejesus scared out of you.

I still haven't made the plunge for this purchase yet. I've driven rather near two different retail establishments and still found the backbone to not pull into the parking lot :). That won't last.

The current rig runs Doom 3 so-so at "Medium" settings on 800x600. I get a fairly smooth framerate (30ish FPS), albeit with some noticeable stuttering depending on the lighting. And yes, it is still horribly startling.

Since I prefer to play in 1280x960 or higher (with all the visual goodies, given my druthers) and things are only going to go downhill once multiplayer overhead is added in to the mix, I figured it was time to bite the bullet and get a system that'll support my primary hobby for the next 3 years (or hopefully longer). Doom 3, Half-Life 2/Counterstrike 2, The Battle for Middle Earth, and even some upcoming MMORPGs will definitely benefit from the horsepower of the new system.

Eerie, your current rig is almost identical to my current rig. Same video cards, processors, and soundcard. I've got just the one HDD (same specs though), and no DVD drive, but I went whole hog on memory when I got it and got 2GB (non Rambus, though). The saddest part? All I play anymore is old school games from my teenage years. Not exactly pushing the hardware to its limits.