Acer predator is a pretty wide brand name, they sell a lot of models of screen, laptops, etc.
FPS is all about settings. If you aren't after completely polished graphics, than achieving a high frame rate is just turning down settings, and even resolution, to reach higher numbers.
2560x1440@144hz or even 3440x1440 at 75hz is a lot to ask of a single GPU. I average in the 90-100 FPS with a single 1080 running everything at max. But I purposely bought a G-Sync monitor so that there wouldn't be screen tearing. A few graphics changes and I could bring that back up to greater than 144 FPS, but I choose not to for the time being. Not that competitive in FPS these days, so I go for subtlety and guile.
Running FPS above the refresh rate of the monitor is going ever so slightly reduce reaction times, but at the expense of more tearing.
1920x1080@144hz is a more reasonable resolution choice for a single GPU to push very high frame rates and minimize tearing. Even the highest settings are in reach of a 1070 (which is why 1920x1080 has started to slip from some of the reviewers benchmarks)
You are not going to see the 1100 series for quite some time. 1080Ti should be an interesting card, since it will basically be somewhere between the Titan XP and the 1080. Hopefully less then $800.
You would have to define lag issues when talking about FPS. Every game has intense moments where the frame rate will drop below the target. If you are referring to input lag on monitors, there are only a few that have really tried to get that down, and they are expensive. Usually the G-sync monitors as well. A couple of TN panels out there that are decent in that regard though.