First, I'd max out your wife's 401k. See if she has a Roth 401k option.
Second, $10,000 in a traditional IRA is low enough that you might consider converting it to a Roth. Then, whether you're over the income limit to contribute to a Roth, you can always do a "back-door Roth." That is, you open a traditional IRA, then immediately convert it to a Roth.
Third, if you currently don't have a lot of money in tax advantaged accounts, you might want to reverse the traditional advice and put bonds in your taxable accounts and stocks in your tax advantaged accounts. The idea is to let them grow to expand your tax advantaged space, then shift allocations later. Stocks grow faster than bonds. The fact that you're just starting out means 1) you don't have a lot of bonds; and 2) with bond yield pretty low, the tax implications aren't that bad right now. As your portfolio grows, you'll eventually shift your bond allocation to either tax exempt bonds (depends on your income level as to whether or not it's worth it right now), or move them to the tax advantaged accounts.
Buying equity index funds and holding them forever in a taxable account is actually very tax efficient. You don't get taxed until you sell them. In addition, if your bonds are in your taxable account, they may be able to double as your emergency fund, allowing you to shift more money to investments.
