Well D'Addarios got rusty too and were not impressing.
Thus far
GHS worst
Ernie Ball next
D'Addarios next
So, I stumped up the change for a set of DR Extra Life. At first was put off not only with the price (over twice that of the other strings tried) but they are BLACK.
But, so far, I LOVE the tone, the feel and the overal ease of play!
The black colour actually looks cool (dunno about the red or blue ones though lol).
Time will tell if they are worth the extra $$$$. I know I have acidic sweat (ask my old woodwork teacher lol) so am hoping this coating will be the annswer :)