For many years, most people I know in the legal technology field have been suggesting the Fujitsu ScanSnap as a great scanner at a reasonable price. I too do not hesitate to recommend the ScanSnap to anyone who is looking for a scanner.
If you are someone who uses a ScanSnap, you should check out the ScanSnap Tips & Tricks forum. The site has several tips to help you use your ScanSnap more efficiently.
Hat tip to Ernie at PDF for Lawyers for pointing this site out.