That's the thing with these machines... if one knew that it would definitely work, then it wouldn't be such a major decision in spending the dollars.
So, are you using an Adaptec on your scanner now? I have an extra 2930U for a PC if you're interested in giving it a try.
Thanks very, very much for the input... no, I wasn't aware of the need for an extra adapter. So, I guess that makes my decision that much easier. The upgrade from v2 to v4 is $495. The Silverfast Ai is $600. But, not having to hunt down the USB-PS2 adapter will make the difference that much more palatable.
Nice to see another Mac man!