There is no generally accepted income point where a Roth account is more attractive than traditional, or vice versa. This is assuming you are eligible to contribute to both accounts. If you make a lot of money, your only choice for IRAs will be to do backdoor Roth conversion.
There are a few reasons why: First, the present-taxes vs future taxes argument is dependent on future tax rates, which is something it is impossible to be certain about. Here's a graph of US federal income tax marginal rates:
Today's tax rates are much lower than they have been throughout most of the century. Will they continue to decline? Stay stable? Go back to 1975 levels? No one knows, and the longer you are out from retirement, the harder it is to predict. If socialism does catch on in the US and the marginal rate on $20K goes back to > 30%, then you are almost certainly better off putting your money in a Roth account. But a socialist government might just as easily say that they have decided they are going to tax distributions from Roth accounts after all for people above a certain wealth level. In that case you would almost certainly be better off putting your money in a Traditional account. It gets even more complicated when you consider state taxes, which will vary not only based on time, but also based on the possibility you may move. And some states do not recognize retirement accounts the same way the federal government does.
The second issue is that it depends on what sort of retirement you want. Do you plan on retiring before age 60? Or do you plan on making any large withdrawals in retirement - maybe to buy a vacation home or help pay for your grandkids' college, etc.? In those cases you will benefit from having a Roth account, since you won't have to pay penalties for early withdrawals and you can take out large sums without worrying about it putting you in a high marginal rate. I made an argument a while back in this thread that if you are someone who is maxing out their tax advantaged retirement savings, then it is better to put them in Roth regardless of your current marginal rate because you will likely have so much saved at the end that the additional flexibility of withdrawing whenever you want and however much you want without penalty will become more important to your happiness than a slight difference in your marginal tax rate.
Lastly, do you care about what happens to your account after you die? You can pass it on in your will, and that opens up a whole raft of new tax considerations.
One more thing of note, since you mentioned doing a backdoor Roth IRA - if you think you will ever do this again, you may not want to put money in a Traditional IRA. The way the backdoor conversions work, you will be forced to withdraw part of this money and pay tax on it when doing the conversion. This does not apply to Traditional 401k contributions.