Traditional. Your marginal tax rate is going to be fairly high, unless there is something unusual.
Unless there is more information present, you should max in the following order:
1) 401k up to the maximum company match (for both you and your wife if available)
2) Traditional IRAs for each of you (for 2015 now, $5.5k each)
3) 401k up to the legal max ($18k for you, plus $18k for the wife, not counting company match)
Pick broad, low-cost index funds.