It depends what you actually consider as needed... I got one HDD, CDRW, DVD, Zip drive, and flow indicator in my case, still have room for one HDD if in need. And with watercool setup inside the case, one can easily go to the lan's...So it's easily portable, all in one box...I consider it pretty usable, and got all I need in it...for now, ofcourse...
How do you define 'actual use of the one's PC'?
I do lot's of stuff on mine for sure...