I would not recommend a scanner that uses the led CIS system of scanning, because you will get lower than expected quality resolution and picture depth. Many other scanner use cold cathode fluorescent lamp vs. the LED light source that CIS scanners use and are vastly better. Please check the specs out on the box before buying. Visioneer makes alot of good quaility scanners that I can recommend, like the 8100 and 8900 models.
But most of all, make sure you get one with a cold cathode fluorescent lamp light source.