What is the best fast Scanner (for documents)?

Need to scan a bunch of documents--faster is better

[superpower]

Can anybody recommend a scanner that is:

1. Fast. (a few seconds to acquire greyscale image).
2. Reliable.
3. At least of average or better optic quality for grayscale documents and/or low quality photos.
4. Less expensive is better :)

I have like a thousand+ pages to scan mostly b/w with perhaps a low quality color photo thrown in here and there. I don't want to outsource.

I currently have a scanner as part of my all-in-1 HP, but it's very slow 15-20 seconds per page.

I'm hoping to find something that will just take a few seconds to acquire the image (like a copy machine copies) and then just a couple more seconds to save, where I can bust out 15-20pgs+/minute.

[LifeinAsia]

I stickied you a link with a comparison of some high-speed scanners that will do the trick for you. All are pretty pricey, but you may be able to find some place to rent one for a while.