Voters will be asked on Tuesday to select two people to serve four-year terms on the East Hampton Town Board. The job involves setting the town’s spending priorities, overseeing land-use policy, protecting water and the environment, appointing members of the planning, zoning, and architectural review boards, and the hiring and firing of many town personnel. They will earn $68,000 next year, plus benefits. Board members sit in on advisory committees and each is assigned as a point person on a portfolio of town departments and issues.