Vernongs right in that its your personal choice what case/HD to get.
But some good models to look for for hard drives are:
Antec (900, P182)
Coolermaster (stacker 831/2, CM690)
Those are just some manufacturers/models, but I found it helpful if I had some things to base my choices off when I was picking parts. So hope it helps
*edit* screw it I'm always messing up which way it goes.