Is it a good idea to move all of our investments to Vanguard? The more I've been reading this blog and forum the more I've been researching where our money has been invested and I'm finding that Vanguard beats everything. I've already moved our Roths there, and now I'm looking at the kids' 401k plans. All of our investments (excepting our employer programs) were previously through John Hancock because my father was a financial planner with them for years. Being family, I don't get charged the sales load on the funds that is normally charged so I've mainly been comparing the expense ratios. Vanguard returns in some cases are similar but in others are much better, but the expense ratios are half or for the 529 plans 5 times less than our current plans! Is it a good idea to move all our investments to Vanguard, or would it be wise to keep some diversification in financial institutions as well? Our employers' retirement plans are not with Vanguard, so there's already some diversification, but otherwise I'd be putting the rest of the eggs in the Vanguard basket. The more I read about the company the more I like them but I'm still a bit wary. Opinions please!