Ben:
You might consider asking the library to conference with the IS / computer support department for the university under which the library is hosted, and ask for their input.
Most academic and corporate entities have (hopefully) settled on products that they already use for disc imaging. It might be an off the shelf product, like Roxio, for instance. The important thing is that the images be created with a product the library (and its' host administration) is likely to have around in the future, supported by on site computer help.
It seems like every disc utility program does some form of imaging.
The only thing I would stay away from is overly complex solutions, like the Eclipse station- or product specific programs like Plextools. For library use I'd have no reluctance recommending user friendly solutions like Roxio or Nero. Most of my own perceptions of "sound quality" differences when using these products come from differences between burn speeds , drive interface issues and unscientific personal bias
I would also recommend you get a bunch of Fifth Circle branded TY's - be sure to include purple in the printing- and sell them as Library Issue blanks. Seems to be lots of money in rebranding and packaging these days.