Best Bet Going Forward?

[Yahtzeee]

In a 12 team (5x5) mixed auction keeper league. Could you please rank the following in terms of "overall" fantasy value from now to the rest of the season. Please don't take in to account keeper value as I am looking for a boost for this season. Thanks. WHIR

Thome, Blalock, E.Dukes, Cust, and J.Guillen

Here is my current lineup:
C VMart
C Posada
1B Morneau
2B F.Lopez (A.Cabrera DL)
3B Zimmerman
SS H.Ramirez
MI B.Phillips
CI Lowell
OF Braun
OF Crawford
OF Ellsbury
OF McLouth
OF Swisher
U Thome

Pitchers: J.Santana, Sabathia, Jer.Weaver, Carpenter, Burnett, E.Santana, Papelbon, Nathan, and Capps

[Yahtzeee]

I would appreciate help with this question. There is an owner that wants Thome and would probably offer up Cust, Guillen, or Dukes. I've always liked Dukes' potential, so I'm considering offering him Thome for Dukes. I also have Blalock on reserve that I'm thinking about bringing for Thome (in our league you can only bench a player if someone goes on the DL). Otherwise he is released. We live entirely out of our 20 man reserve list and have no free agent pick ups, so if I drop Thome, there is no getting him back. For this year, should I stick with Thome, or go with any of the others mentioned?