500-1000 rounds to break it in? Really? Seems like a copout to me---don't bug us about your problems. Yet I am hearing more and more tales of new gun buyers being told that. Can't they make a machine that reciprocates the slide and dryfires the thing for the required period?
I'm sure we'd not accept that thinking from any other high dollar purchase. As in: "I'm sorry Sir, but our refrigerators will malfunction for the first six months, you know, you gotta break them in for awhile". Or "We intentionally build our new Ford trucks to jam up at highway speeds for awhile--until it's broken in".
I'd say go with the one that claims to work properly from the box. Who can afford to waste 1000 rounds doing R&D the manufacturer should have done?