DR Strings Pure Blues PB-45/100

As with other nickel wound strings, these strings sound well balanced to my ears; they are neither too bright nor too warm (compared with other string types), but depending on your setup, you can easily push them in either direction (but not drastically). After having them on my bass for ~3 months now, they did lose some "freshness" after 1-2 weeks, yet they still sound great and didn't lose much character since then.

If you prefer more balanced sound and you're looking for a durable strings, I would recommend to try these out.