Digital BW, The Print

I've done lots of homework in recent weeks researching what is the 
best scanner for b&w negs as well as  chrome and color neg., with the 
emphasis on B&W.  I would appreciate some feedback from those who 
have direct experience with Nikon IV ED/4000 , Minolta dual elite II, 
Canon 4000 and Microtek 4000tx,& also the Epson 3200, or equivalent 
scanner.

Thanks in advance,
Mike Kless