Not sure I would call it "old" just yet.
It's a 3GHz Intel 4. LOL
The new system I'll probably have a top of the line CPU (likely go back to AMD maybe), 2GB RAM min, use my current graphics card (at least I plan on that, bc I'm not a gamer and it works in Aero fine), my current Sound Card (Audigy 4, again fine). And I'll likely get a faster DVD+RW drive than I have now.
Truth be told though, I'm not sure what processor I want. I don't even really know what's available at the moment, or what will be post-Christmas. I'm considering 64-bit, but I'm not sure it's worth it yet. Suggestions are welcome, just remember... I do have a wife, LOL. That means don't give me something that'll cost $1500-$3000. I'm looking to spend no more than $1000 at the very max. It's a business computer for the most part.