I tried the stainless Lisa E...
And I love it! Doesn't rust, and has a full tone that still cuts right through a full string section and choir. Never falters. I definitely recommend it.
I also tried the brassed Goldbrokat E. Was just a plain steel E after 5 hours of use.
I also had trouble being heard with it, and the tone was nothing special. Literally impossible to make it whistle, though. Maybe the higher gauges are better.
Thanks for sharing-I have never tried it myself. I guess it sounds "full" rather than bright. It may be the one for you, given your situation.