Thank you for the thorough reply! I basically just want no studdering or screen tears and as less lag as possible - the reason I don't use Vsync. Sounds like GSync would be quite good to have. If I only had to buy the 1 screen I'd probably do it, but it gets a lot more expensive purchasing 3 of them.
Not at all urgent, to be honest I'm very happy with my current set up, it's pretty damn smooth.
I will just add a few thoughts from my own experience of late.
Calling it "motion blur" isn't really accurate, though it is a fairly close description of what's happening with lower FR's. What's happening is you are getting information too seldom in order for your brain to get a clear image of a moving object, whether it be passing scenery, or a passing car. Your brain interprets 60fps with some blurring effect simply because it is trying to interpret what it is taking in.
Your eyes most definitely CAN see the difference - don't believe any of the science to the contrary, because it is assuming one very big assumption, which I will not write about here because there is a real chance my theory on this could be worthy of a scientific paper. Someday I may talk to someone at the university nearby about helping to do some experiements proving why 60+hz is able to be noticed by a 60hz eye. People who think they can't see it are merely not noticing it. That's the take away.
But it is one of those things where, once you see the difference, you can't unsee it. Once you feel the smoothness, you can't unfeel it. Now that I have a 144hz monitor, I cannot stand any game at 60hz, so beware of that.
Stuttering will still occur unless you leave overheard room or have G-Sync or Free-Sync. The cost of G-sync is not necessary at this point. Put that money into a better card if you need the frames. In other words, people will try to run 120hz or 144hz in games with no regard to whether their card can push the frames. When framerates drop, they will see either tearing or stutter, even with high FR. (Though, the amount of time that frame is up on the screen is of course, shorter.) When framerates rise above your monitor's refresh rate, you will see tearing. Using nVidia's "Adaptive V-sync" avoids most of the ugliness when this happens by only turning on sync when frames go above 120hz in my typical example, and therefore the stutter of v-sync during lower framerates is avoided. But leaving some overhead should be a best practice for any game anyhow. Pushing your card to 99%, 99% of the time is foolish, IMHO.
So, to recap:
When framerates drop below refresh rate, and V-sync ON, it stutters.
When framerates drop below refresh rate, and V-sync OFF, no stutters, but noticably slower and less smooth gameplay.
When framerates rise above refresh rate, and V-sync ON, it avoids tearing. (but you will still see stutter at below refresh)
When framerates rise above refresh rate, and ADAPTIVE V-sync ON, it avoids tearing AND stutter, by means of giving you best of both worlds.
G-sync helps to smooth out gameplay when refresh rates and frame rates are not identical.
Frame Caps:
Useful if you desire not to use v-sync for whatever reason.
Useful for helping your GPU have some overhead. If your screen is incapable of more than 60hz, you may think hard about whether to ever let games go above that. Your games will be smoother, because low polygon areas are not keeping the GPU load high and when you go into a higher polygon area it is able to cope with it better.
Prevents your game from rendering many more frames than your screen is capable of displaying. (As far as I can tell, all 3D applications will still render more than your refresh rate even if adaptive v-sync is on. Capping it at just above refresh allows the games rendering to go high enough to initiate adaptive v-sync, but not so much that it is wasint resources.)
Especially helpful in conjunction with Adapative v-sync, where v-sync will only turn on when FR's go above RF.
In my 120hz example, use adaptive with framerate cap (in rivatuner) of 122.
Those who are not using v-sync but are saying they never see tearing, are simply incorrect. They may not notice a tear, and if they are using 120hz or greater, they may not be on screen very long, but they are there. But if it is acceptable to you as the gamer, then there is no problem
So, how do you get best of all worlds without going the G-Sync route and spending almost double? Adaptive v-sync AND leave some overhead in your graphics settings so that you never, ever (or hardly ever) drop below your desired refresh rate. So, in AC I typically run 120hz on very high settings. I could run higher settings buy would see more frequent drops in FR, amounting to stutter. I got all this equipment to see smooth frames, so I sacrifice a couple graphics settings to keep things smooth.
I hope this helps...
). But in other games the input lag can be quite high and very noticeable.
It is a pretty sweet setup though.
But then we don't get free entertainment like this in our front yard either. 
