OK, here's why I asked who's going to build this cue, you or someone else.
You, the builder, should have a working knowledge of cue construction. As a player, you should be able to easily understand that the break cue will see more force put against it in just 1 shot than your game cue will in the entire set. The break cue can see an enormous amount of force.
Now, you've seen the pics and I've stated previously that the orig. Uni-QR pin is set deeper in the cue (approx. 2-1/4") whereas the other 2 pins are set into the cue at only 3/4" IIRC.
The very fact of setting the pin deeper into the cue, by itself, will make the connection/joint stronger. Particularly in my break cue, I want all the solid construction I can get. I have this mindset with all the cues that I build but here is an instance where it is really put to the test.
Now that I understand what you're wanting to do, I'm going to suggest, of the 3 you've selected, the orig. Uni-QR. I'm not going to recommend something that I don't use myself.
http://forums.azbilliards.com/showthread.php?t=95215
You'll notice that I add additional strength to the joint with the use of phenolic collars.
Hope this helps.