I give Hamilton $4, DLee $26, Maybin $4 and Doumit $1 and I get Kemp $7, Mig Cabrera $16, Taveras $9 and ?. I might be able to get Kershaw $4, Aviles $1, Greinke $4, or Headley $4 as the ?.
Who should I get as the "?"? Is this deal worth doing anymore even if I do get to add one of the 4 players above as the "?"?
Kershaw's up already and he should only get better. (Scout's are pretty crazy about his stuff and his home park is great.) Greinke might have the most value next year, but he'll be undervalued in next year's draft and won't go for much more than he's already at. Aviles, should not be as good as he has been, or he's a late bloomer. I say there's a 50/50 chance of either scenario. Finally, Headley's in Petco and hasn't looked great -- eh.
So I'd go Aviles or Kershaw. Aviles has more risk attached, but Kershaw is a pitcher and 9 times out of ten you want to keep a hitter.
Personally, I'd keep Kershaw. (Or, in your case, go after him.)