I might have added: Of course I went through this list. I was actually hoping someone would tell me something along the lines "I use this scanner, and I'm very happy with it / and it works, but there are the following problems ..."
You could look up what scanners work well with Linux. I have an HP Officejet 6500-f, IIRC. It's a printer with a built-in scanner that works very well. Also, what programs are you scanning with? xsane or simple scan?