Index Funds should be the default selection
I haven't used Vanguard products much, but will likely do so in the future.
I bought and have done well with EEM, which is a Barclay's ETF, tracking the EAFE index. But, Vanguard has an ETF called VWO that tracks the same index at a lower management cost. When I've compared the two on the Yahoo finance site, VWO has generally won out. For various reasons, including your location, ETFs may be preferable to mutual funds.
VTI is Vanguard's ETF for the total U.S. stock market index (the Wilshire 5000 index). This has an expense ratio of only 0.07% - which I think is the lowest on record.
I think index funds should be the default selection. On certain occasions some new shining start of a fund manager may catch your eye, but I think those are the exceptions not the rule.
I also own some Berkshire B shares, which I treat as a balanced fund of sorts. It's good for taxable accounts since it does not pay any dividends and has usually exhibited less volatility than the market as a whole.