I believe that Roland mentioned there were some minor fit issues with G19's and KKM's into G34 holsters, but not enough to prevent the safe carry of one within the other. I believe this is reflected in Scimitar 2's picture where we can see that the KKM is much more square-cut at the fore, then the beveled nose of the G34. I presented the question poorly in the initial, in thinking it was a matter of length instead of a matter of shape.
No need to swap RSA that I've seen now that I have more time on it. The only way I was able to get mine to choke is by running it bone dry (no lube) and shooting standard pressure 147gr ammo (about 900 fps). When lubed properly it runs.
Question, a sorta-local GS has the factory suppressor setup G19 (threaded barrel, tall sights) available. Is it worth starting with one of those to get the correct iron sights versus getting a standard 19 and changing the sights? I figure the barrel is going to get ditched either way.