FWIW, I have a baritone-cum-bass voice. For years I have kept my banjo tuned down three steps (eBEG#B) That way I don't have to capo up and sing down nearly as much. I got the idea from Leo Kottke whom, I read, regularly tunes down his guitars. Anyway, my banjo holds pitch perfectly, and the strings have a very soft touch at this tuning, which may be of value to those with brittle nails.
If it's of any informational value, I play a Vega Old Tyme Wonder and I use light strings. I have no problems with string buzzing, but I will admit I do like the action a bit higher than do most players. The best part is that, if interested, you can try this for free. I will warn you that it feels different at first, and will take a little getting used to (in other words, you can't tune down for one song, decide you hate it, and tune back up. Check that; of COURSE you can do that if you want, but I would suggest playing down-tuned for a couple of hours at least before you decide.)
Also, on an unrelated subject; Flex Seal (you know, that spray-rubber stuff that dude is always hollering about on those tv commercials--the stuff where he replaces the bottom of a boat with a screen door and sprays it with this stuff to show that it won't leak--works great for cosmetically repairing hard-shell banjo cases. My case was scraped down to the wood in several spots (HOW it got scraped down to the wood I am not about to admit. Suffice to say it did its job by protecting the instrument inside.) Anyway, this stuff not only covers the blemish, but if you lay it on thickly, it kind of wrinkles and almost matches the natural texture of the case.
Rand