If eligible, a Roth IRA is almost always a great idea. For you and your spouse. If your income is too high, then consider the so-called Backdoor Roth IRA.
Otherwise, invest tax-efficiently in a taxable account.
But it is not clear what you are asking. A Roth IRA is ALWAYS better than a non-deductible traditional IRA. But sometimes you have to contribute to a non-deductible traditional IRA in order to convert that to a Roth IRA.