This summer I am working on an archiving project that will require me to scan a plethora of documents. I have the funding to get a scanner to do this task. I'd like something with a document feeder and duplexer and preferably can scan directly into a PDF. Does anyone have an expirence with such a product? This is all new to me, so I'd like to see if there is a clear popular choice for this type of scanner. Thanks!