This Vanguard ETF could be a "happy medium" that's attractive to many investors. Choices, choices. Baskin-Robbins is famous for offering 31 flavors of ice cream. Heinz's famous slogan mentioned "57 varieties" of products (although the company actually has more than that). If you're an investor, Vanguard markets 97 exchange-traded funds (ETFs). You don't have to be overwhelmed by the number of ETF options, though. Here's arguably the best Vanguard ETF to invest $1,000 in right now. Crossing contenders off th ...