When are 1:1 baluns worth it?
The answer depends on your HW configuration. Maybe you can add additional information on your HW.

A dipole is a balanced antenna, meaning that signal wave-forms are complimentary to each other on both elements of the antenna.
If your receiver has a balanced RF input, then you don't need a balun. You might need a matching network though.
On the other case if you have an un-balanced RF input, you will need a balun (=Balanced to Unbalanced).

Cheers.