Make sure that if you get an internal SD/FF, that you will know how to mount it so that it doesn't just stick out and look ugly.
On one end, it will come with just the VGA port which was originally intended to be mounted through one of the DB9-style cut-out holes, on the back of a tower case.
Putting an internal SD/FF to the original desktop case requires some custom fitting, that is if you want the whole job to look nice.