This will change a time or two, but...
That would be my 20 for now... but, could change based on what happens with Chris Brown, Travis Henry and Fred Taylor. Also, I'm uncertain as to where to put any Vikings' or Falcons' RBs at this time, but I am working on the overall list to publish soon on our site.
Foster is a reach here, depending on his injuries.
Also - I think each of the top 4 rookies (Benson, Williams, Brown and Arrington) have a shot to end 2005 in the top 20 overall. But, I'm not listing either here just yet. I think Arrington could lead the pack, actually.