They are pretty much all the same.
I've tried them all, and none compare to Brooks (only available in certain markets and this isn't one of them!).
Remember this:
http://www.ala.org/al_onlineTemplate.cfm?Section=february2001&Template=/ContentManagement/ContentDisplay.cfm&ContentID=5282
http://www.counterclintonlibrary.com/cgi-data/news/files/41.shtml