Canon DR-C240 is the latest document scanner that achieves 90 ppm while doing double sided scanning. Price is expected to be around 49,800 Japanese yen (~ $400). It shall be noted that two sided color scanning is 60 ppm which is still very fast.
Canon DR-C240 scanner scans at 600dpi and its body measures 291 × 603 × 363mm (width × depth × height) and weighs about 2.8 kilograms.
Capture Perfect scanning software comes bundled with it that supports automatic encryption and brings hoards of useful scanner-related functions with it. The Canon DR-C240 scanner not only supports automatic input of paper but also purchase orders, receipts and business cards.