I was thinking of Mark and his awesome career of getting take photos at live performances but I think there there are a few other heavy Photoshop users on the board too.

A GPU specifically for Photoshop.
.

I have no idea if it's a worthy investment as my Photoshop experience is limited to a few tweaks of our snapshots. Thought it might be of interest to 'the pros'.

With great power comes Awesome irresponsibility.