The fi-5120c can scan 25 sheets/50 sides per minute, 50 sheet ADF, very good mis-feed prevention, etc., etc. It seemed to be the best scanner for the price - I think it cost around $600 at the time.

Fujitsu doesn't have OS X drivers for it. VueScan doesn't support it either.

The current version most similar is the fi-6110. It's $650 or so. It doesn't have OS X drivers either.

Newer scanners often have OS X drivers since OS X has gotten more popular. That helps Linux as well since under-the-hood they're so similar. But a lot of these more specialized tools often still only have Winders drivers. Unfortunately.

Cheers,
Scott.