S&MM REVEALS THE BEST PLACE TO SELL IN 1999     In its "20 Hottest Cities" article, Sales and Marketing Management ranked Sioux Falls, South Dakota No. 4.  Other rankings for Sioux Falls include: "1st for Entrepreneurial Friendliness", Small Business Survival Index; "2nd Entrepreneurial Hot Spot in the USA", Cognetics, Inc.; "3rd Lowest US Unemployment Insurance Premiums", Expansion Management; "5th Least Stressed-Out American City", Ladies Home Journal; "7th Lowest Tax Burden in the USA", Inside Economic Development; "Top Ten Cities for New Jobs and New or Expanding Facilities", Site Selection; and "One of the "Next Big Growth Markets" for Residential Building", Builder.