Honestly I don't think he has any more injury risk at this point than any other 32 year old outfielder. He completely shattered a bone a few years back in a freak injury...this isn't something likely to recur and he's been healthy for well over a year now.
I expect him to hit about .275-.295...wish I could be more specific but I'd like to see another full season of post-injury numbers before I make any decisions there. The power is for real - he'll put up about 30 a year. He'll steal about 10-15 bases on a season but that will probably start tailing off into the 8-10 range over the next few years. And as long as he's hitting right behind Konerko and Thome in the lineup expect 100-110 rbi's.
Hope springs eternal
grows like ivy on the vine
then dies in the fall
--Haiku for a Cubs Fan, The Loveable Losers