I'm finally getting a new workstation here at the office. My decision is now down to getting a box with a single Duo 2 Extreme chip, or two 3.2Ghz dual core Xeons.

Mostly we'll be using this machine for photoshop and after effects work with file sizes ranging from 4096x3112 all the way up to 8192x6144.

Thoughts? I need to make this decision pronto while their checkbook is still open!