I got the canon n1240u and it is a great scanner. Superb size. And only one cable (usb). There is no need for power cable at all.
Great twain software with alot of functions. And actually a working ocr software (omni page pro 9). And great image quality.
I haven't used the latest epson scanners, so I don't know how they are, but I really like my canon scanner.
I have also used canon scanners for computers I have built for friends. n630u, n650u, n670u and n1220u. All of them are doing great.