I was worried reading the title that you'd be forced into buying investments only from American Funds. Good to see that they have some nice Vanguard options available. Those percentage allocations look to be a reasonable approximation of Vanguard's four-fund asset mix. You don't have a good low-fee option for mid-cap stocks or international bonds, so you may want to make up for that in your IRA. Once we're adding other accounts into the mix though, you may decide it makes things easier to just buy one or two funds in this 401(k) and make up for the rest elsewhere.