Thanks guys. I know i need the mounting bracket for the old hard disk to sit in the optical drive bay, but i can pick that up on ebay for like $20 Australian.
Was thinking a kingston HyperX 240GB, instead of the samsung, but i guess its better to future proof myself. Im going to be running some pretty intense software (Ableton, Traktor, Autocad, 3ds MAX) My other question is - is it worth upgrading from the current 2 x 4gb of ram to 16gb or even 32gb? Cheeers