Thanks for the reply - I agree with your analysis of the situation.
I had already looked at
www.saneproject.org. In fact, I had looked up every scanner that I could find for sale in the UK in their "scanner search engine", with the following being the only ones supported:
- Canon LIDE 25 - "good" support
- Various HP scanners - "basic" support
- Various Epson scanners - "good" support using third-party "epkowa" backend
We eliminated the Canon LIDE 25 as being too slow, and we also eliminated the HP scanners since the support was only "basic".
That left the Epson scanners - and the V200 seemed to fit our requirements. The scanner is indeed capable of scanning at 600dpi and 1200dpi, but only when using the Windows software supplied with the scanner. Unfortunately, Avasys appear to have decided to restrict the resolutions available when using their driver - I would classify the support as "basic" or "minimal", and certainly not as "good".
I don't whether other Epson scanners (e.g. the V350) have similarly restricted support, or whether the "basic" support of HP scanners would actually be good enough. I was hoping that someone with experience these scanners would be able to make a recommendation.