It varies between brands, but 50 - 100 isn't very balanced. The G will be tight but the E loose. Something like 45, 60, 80, 105 or 50, 65, 85, 110 would be better. Also you will probably have to adjust your truss rod. This isn't as scary as it sounds (unless you have to take the neck off). After that, action and finally intonation will need to be reset.
For a warm sound that lasts, maybe try some flatwound. Jamerson never changed his very thick flats ever.