Find out what kind of conversion options are on the 30 year level before you make a decision. Northwestern's t80 is convertible to age 60, so you have a lot of time. Also, see what a "minimum mix" Adjustable comp life policy looks like with Northwestern. It is a form of whole life that has a much cheaper cost. It's also very flexible. See if that fits your situations for the long term instead of renewing term policies into your 60's and 70's.
Most term policies are convertible up to age 70 or 75, some up to age 80. Of the mutual WL companies, Guardian's conversion goes up to age 80 if I'm not mistaken. Nothing like drastically overpaying for your term insurance for the potential conversion option that most will never use, when there are plenty of cheap term policies with good conversion options. Genworth's TermUL guarantees premiums up to age 105 after the term period instead of going up every year to a price nobody would ever pay.