With robust finances and well-trained public work forces, Austin, Texas, and Phoenix are the best-managed major American cities, according to an analysis by Syracuse University. The study rated the municipal governments of the nation's 35 largest cities in terms of revenue, assigning grades from A to F on five management criteria: finances, human resources, capital, information technology and results. Indianapolis, Minneapolis and Virginia Beach, Va., averaged B+. New York, Philadelphia, Honolulu, Milwaukee, San Diego, San Antonio, Seattle and Long Beach all had Bs. Los Angeles got a C.