Can't comment on the power issue as I'm not an expert on such things, but rumor has it that Core Sound's box is really the way to power the 60 series as it doesn't use a diode like DPA's 9v box. But I don't really know what that means. I use DPA's MPS-6010 with 4061s and I never expect to have a problem at a concert with SPL. 144 dB will kill a man, and I can't think of any musical enviroment that aurally toxic... but your question is about range and that's up to someone else to answah.
As for bass, though, most of the time you're not even going to use the damn filter, the mics are that tight. I wouldn't have used it with the mics 5'6" off the Fillmore floor at Ministry and am glad I didn't - the only thing wrong with that recording is the damn omni bass reverb! ("Rolling" in that situation would only have masked the problem and made the recording sound weak.)
But it is a good option to have.
Armen