I had sort of gotten the impression from various comments over the years that the 219 required significant modifications to actually sound good. I've never used one, though, so that's just me acting as an aggregator here....
Not sure about the 319. From what I've seen of Oktava mics, I'd expect a lack of high end detail in an unmodded mic---mainly taming the sibilance. If your singer is sibilant, that's a good thing. Otherwise, I'd expect a reduction in intelligibility.
I know there's a fine line between warm and dull, so those could easily be a good choice for some singers, but my gut says more often than not you'd be better off finding a modded 319 if you go that route, and even used, that will likely put you over $300.
I think the original poster should go to a music store and try some mics if at all possible.