So, just to keep muddying up the waters...
About a year and a half ago, I bought an Epson 810 Artisan all-in-one printer, scanner, fax etc.
Works like a dream, Epson Scan can be configured pretty much however you want it, and any of our laptops can access it wirelessly (is that really a word???) without sharing, networking, etc.
And it rocks, it can scan to .pdf or pretty much whatever you want to do with it, and it's very quick. I'm not sure of how much resolution it can go to, but so far as I've used it, no problem getting fairly high rez scans.
More specs on request.
Just sayin'...
Chris