Hi Nagendra,
We have a lot of experience with Kofax Ascent Capture. You could use the new Fax Module from Kofax to automatically import faxes into Ascent Capture and then extract the necessary information from the faxes. Then you could release the images and indexes to Alfresco using the new Ascent Capture > Alfresco release script. The limitation of the fax module is that at the moment it only works with RightFax and the TopCall platform.
Another way to do it would be with the auto-import module from Kofax. With that module you can monitor one or more fax directories, import the faxes automatically into Ascent Capture and then process them like described above.
For scanning of large quatities of documents I also recommend Ascent Capture. It's the best solution. Very scalable, very flexible and very powerfull when it comes to automatically classifying and extracting information.
If you need a good production scanner, well, there are a couple of good brands, like Kodak, Fujitsu, Canon and Böwe Bell + Howell. Small scanners can be had for under $ 1000 these days and prices go up to as much as you like. To recommend a good scanner I would need to know how much documents/pages you're going to scan each day and what quality the documents are.
Hope this helps.
Best regards,
Christian Zierleyn