I wouldn't mind Lidge. Turnbow is garbage, and Baez shouldn't close.
As for Justin Speier, sure others have failed, but this guy has been in the pressure of the AL East facing the Yanks and Sox so he can handle that. He's had a sub 3 ERA 2 straight years in the East. He had 25 holds, 5th in the AL, so even if he doesn't close he's a good setup man, as he has been doing in the past. There's a difference between Middle Relievers and Setup Men IMO.