Is it worth doing? The optical is IDE (UJ875) I have 250GB drive at moment. I have a 250GB sata and a 100GB ide drive in a drawer. I have a 120GB SSD i want to install. but as the optical is pata is it worth loosing the optical? is usb faster? of if I could find one a firewire caddy? I cannot afford a newer imac, I want one but just dont have the funds. So need upgrade the imac until can afford a newer unit.