Digital BW, The Print

Hi,
I am going to buy a Epson 3800 ( 1350 euros ) in the next days and have been
offered a used 4000 ( 1000 euros ). And I doubt now which could be the best
option. I want it for both , color and BW ( I have a 2100 to BW with UT7 too
). 
Which do you think I must choose?
regards