Oh, and if you were to add any "wow" items to snazz it up, what would they be?
Oh dear... This is a tough one!
As it is, this is a rather nice system.
I think I would slightly upgrade the RAM to this G.SKILL 4GB PC2-6400
You could grab a new case - one that has better cooling potential, perhaps. Or grab some nice new case fans, and clean out the old one thoroughly before you add any of the new components.
Also, to snazz things up, as you say, I like it personally when I have a nice keyboard/mouse/monitor, which I have not included in this list. I recently purchased a Logitech MX Revolution mouse, rather expensive, but very
Sometimes the little things like that make a whole lot of difference to your system.
Anything in particular you had in mind you wanted me to recommend?