@Rayzorblue

Your current setup isn't that far from my existing main system spec.

Athlon 64 4000+
Asus A8N-SLI Premium
GeForce 7800GT
3GB Ram
etc..

And that does still run all current games, but not at 1280x1024 or higher resolutions. For most games released recently such as Far Cry 2 I've had to drop them down to 1024x768 to play with smooth framerates over 30fps with the nicer texture and shadow settings switched on.

Assassins Creed and even Crysis ran very well which was quite a surprise when i tried them. Assassins Creed ran especially well at 1280x1024 with most of the graphics settings quite high up. Crysis had to be dropped to 1024x768 to run with higher settings, but it ran higher with medium settings quite well. However with falling hardware prices I thought it was time to upgrade as the core bits of my existing system (motherboard, CPU, GPU) has just reached 3 years old, and the games now being released beefit a lot from a multicore CPU finally.