How much do you scan?
Do you need a document feeder?
Network or USB?
I have an HP office jet all in one. It does ok for my limited use. I fax as much as I scan.
This comment is 13 years later mid virus but I am using a scanner probably that old with Windows 10 for A4 scans Epson Perfection V200 Photo. It can do quite a lot of useful time saving things like multiple separate scans. Colur enhancement etc. I use an A3 Brother Printer Scanner for bigger work but not yet gone bigger to A2