GNUru Mailbag: Bill in the Hall

The GNUru advises another loyal reader on what to do with the eminent return of Bill Hall: I'm in a Yahoo Fantasy Baseball League. I am currently in 1st place by 19.5. I have Bill Hall (3b-ss-of) who will be coming off of the disabled list soon and am not sure what to do. My shortstops are Troy Tulowitzki, Michael Young, and Miguel Tejada (who will also be coming of the DL soon). My 3b are Julio Lugo (2b-3b-ss) and Kevin Youlkilis (1b-3b-of). My outfielders are Carlos Lee, Corey Hart and Shannon Stewart. Is hall better than any of my current team? If so, who should i drop to pick up hall? Which SS should I drop or trade when i activate Tejada? What can i expect to get in return for m young or Tulowitzki?