difference btw asusp4p800-d and non d

[NYCSTE2003]

what is the difference if someone can make it simple and clear why pay more for a deluxe?

ive figured these are the differences if anyone can elab that would be great

setup - difference is placement of more hdds slots, and different mobo heatsink

raid and firewire is only thing i can think of, soo if i didnt wanna use raid and i dont own firewire should i not think about the deluexe??

anyone know any performance diff???

thanks