Originally Posted by
DanceswithUnix
I think the suggestion was to change the case to one without a PSU, not to ditch the PSU.
It is very rare to get a good PSU bundled with a case, and a bad PSU is a potential source of problems and in the worst case destruction as the protection circuits tend to be inadequate or non existent.
Edit to add: I tend to install from USB drive these days, so although DVD and even blu-ray drives are quite cheap these days I wouldn't see one as necessary. I also have a USB DVD drive for use with my netbook, perhaps you can borrow one of those if you know someone that has one?