Things to buy your Mac Pro to show it you truly love it (and things I hope to buy mine once Apple releases it and I actually own it):

-MCE Tech SATA Blu-ray burner - Final Cut Pro can burn Blu-rays direct now. Alll riiiiight. 

-Other World Computing Mercury SSD (SandForce drive)  - boot drive!

-Universal Audio UAD-2 PCI DSP card - all of Karmacoda’s albums are mixed and mastered in the box, but with analog-modeling plugins running on UAD cards. You can hear the result, nom nom nom.