I had a pair of the Cascade Fatheads with the Cinemag transformers and they are excellent. Just enough gain to drive a Mackie VLZ-3 (the better pre-amp kind) or even an old Yamaha O2R that I have to use regularly. They will work on brass. I sold my pair because I didn't have that much use for them.
(I do a fair amount of live TV and audio post).
I like the Heil microphones because they do have strong output. I sense they are also brighter (a PR
40 has more of an upper mid punch than the EV RE-20 which it's modeled after). If I need a dynamic for a voice-over, I'll use a PR
-40. I want to get a couple of PR
-22s and see how they stack up against a Beta 58A or an EV 767 Ndym.
In my experience the Beta and the EV would work if you were spot micing brass.
We're neighbors. You're in Ennis and I'm in Dallas.