The Sacramento City Council is set to vote Tuesday night on the developers who will tackle the blighted K Street Mall. The question before the council is whether to support the recommendation of Mayor Kevin Johnson's ad hoc committee to go with the biggest proposal, which has a "Boqueria" public market as its centerpiece, or to back two other proposals to redevelop the troubled 700 and 800 blocks of K Street on $40 million in city-owned land. Only one selection committee had been identified in the city's request for qualifications. Last month, that committee recommended the 700 block be redeveloped by D & S Development and CFY Development, with their Promenade on K project estimated at $